The Pet Parent’s Guide to Candle Safety: What Actually Matters

If you've ever Googled “are candles safe for pets?” you probably discovered that the internet has two ridiculously unhelpful answers:

"Absolutely! Just trust us. Now buy this magical "pet-safe" candle!"

"NO! And if you've ever lit a candle within 500ft of a cat: straight to jail."

As with most things involving health, safety, and the interwebs, the useful answer lies somewhere in-between.

If you don't know, I make candles (like really cool candles). I also share my home with two dogs (Theia & Skoga) and three cats (Gandalf, Pippin, & Gimli). Every single Starlight & Sage candle is imagined, tested, poured, packed, and inevitably inspected by at least one of those begrudgingly unpaid interns in the same home studio.

Before being sold, every candle (ours included!) should be tested in accordance with ASTM F2417, a standard establishing fire-safety requirements for all candles. But this testing only evaluates the fire performance of the candle itself and does not certify a candle as medically safe.

Five furry roommates obviously do not a scientific certification make, but their little lungs, boop-worthy noses, and general inability to mind their own business are excellent motivation for me to distinguish between legitimate risks and vague marketing. So, I got into ADHD-driven hyper-focus mode and started digging into veterinary guidance on candles, fragrance, essential oils, and everything in between.

The good news is that most healthy cats and dogs can, and do, happily coexist with candles. But, as with everything, caveats exist. There are precautions worth taking, and some animals (birds!) require considerably more safeguards. Even as someone inside this (very nice smelling) industry, some of the terms give me pause.

So, to keep it all straight and hopefully save you from maxing out your Safari tabs (yes, apparently you can do this... ask me how I know), I'm putting everything I learned into this neat little blog post tied together with a smile, research, and reputable sources (links at the end). And, of course, I'll pop back in and update it as I learn more.

Just call me Ms. Frizzle. Also if you're over the whole nerdy research thing already, or you're a 'read-the-last-page' kinda psycho, I've included a Pet Parent Checklist at the end. Enjoy, fellow candle lover. Tell your pet I love them.

First, what are we actually worried about?

When the general public talks about candles being “toxic” to pets, several very different risks get thrown into one terrifying bucket. Obviously, that's far from helpful. But when veterinary and safety sources discuss candles around pets, the primary concerns fall into four main categories:

Fire & burns
Smoke & airborne particles
Fragrance & respiratory irritation
Ingestion & direct exposure to candle ingredients

Each one prompts its own guidance, so hop aboard my Magic School Bus and we'll dive right in.

Risk No. 1: Fire & Burns

Before we get anywhere near candle chemistry, let’s acknowledge the open flame sitting on your table. Cats jump, tails wag, and puppies eat ev.er.y.thing. Flames and hot wax are sometimes just too enticing for curious creatures, and, frankly, who can blame them?

In other words, one of the biggest risks associated with candles and pets has absolutely nothing to do with whether your wax came from a coconut (yes, us), a bee (also us), soybeans (nope, not here), or petroleum (absolutely never).

Pet parent guidance: Keep your lit candle on a stable, heat-resistant surface where your pet can't reach it (or fling it off with the force of a thousand furballs), and never leave your pets unattended around an open flame. They just might perform a sacred ritual, and there's really no telling what they'll summon this time of year.

Risk No. 2: Smoke & Airborne Particles

A burning candle is, well... burning. Every candle flame produces emissions (heat, light, water vapor, wax vapor, and CO₂), but a properly burning candle with a controlled flame should NOT produce black smoke or excessive soot (i.e. airborne carbon isn't healthy for humans OR animals). That's where wick maintenance comes in.

Despite my clear wick preference (say hello, you gorgeous crackling wood wicks), what matters more than 'wood vs. cotton' (we'll get to that later) is whether it's appropriately sized for the candle and properly maintained (that's your job, babes!). An overgrown wick of either variety can mean a larger, less stable flame that results in the dreaded black soot (anyone else getting Pirates of the Caribbean flashbacks? No? Just me then.).

In case you're wondering, I test every single Starlight & Sage candle to ensure the wick, wax, fragrance, and jar play very nicely together. In other words... SO. MUCH. TESTING. Which, thankfully, I adore. Go science! And spreadsheets!

Pet-parent guidance: Trim your wick, keep your candle away from drafts, and follow the recommended burn time. If your candle starts smoking, dancing like it's 1989, or leaving soot behind, extinguish it and go back to step one.

Risk No. 3: Fragrance & Respiratory Irritation

Animals experience scent very differently from us. Something does not need to be poisoning your pet for them to tell you, quite reasonably, to... ahem... fuck off. So even when a fragrance isn't causing toxicity, an intensely fragranced environment can still be irritating or unpleasant to an individual pet.

Veterinary guidance recommends extra caution around animals with existing respiratory conditions (e.g. feline asthma, chronic bronchitis, airborne allergies, etc.). For everyone else, one of my favorite safety precautions costs exactly zero dollars and is probably something you already do perfectly... pay attention to your pet.

If you light a candle and your four-legged soulmate immediately relocates, let them. If you notice coughing, wheezing, watery eyes, drooling, vomiting, lethargy, or unusual behavior, extinguish the candle, get them some fresh air, and check in with your veterinarian.

Also, please refrain from hosting the "Fragrance Olympics," because smells rarely exist in isolation. There may be a diffuser running, a plug-in fragrance in the hallway, room spray on the curtains, perfume on your clothes, cleaning products on the counter, and then you light three candles.

Individually, each product may be used exactly as intended, but collectively, your house has achieved a scent palette akin to a Jackson Pollock painting. When pets are part of the equation, think about their total fragrance environment, not merely the candle.

Pet-parent guidance: Fragrance responsibly, and always provide your pets a scent-free retreat to use if they need it.

Risk 4: Ingestion & Direct Exposure to Ingredients

Soooo maybe you're asking, "but what if my pet... eats the candle?"

I get it. No judgement. Mine pass around the single brain cell too.

First things first, immediately take the candle away and contact your veterinarian. Some types of wax can cause gastrointestinal upset, while fragrance ingredients and other candle components introduce additional considerations. If your pet consumed a significant amount, swallowed something other than wax, or if you're unsure exactly what they ate, it might be wise to call animal poison control for guidance.

Do not induce vomiting unless a veterinary professional specifically tells you to do so.

For the lucky few of you whose pets are playing with a full deck, perhaps you're wondering how on earth this happens. Allow me to briefly tell you about Skoga...

Over the last two years, my 115lb Rottweiler has enjoyed licking up the occasional slivers of coconut-apricot wax that don't make it into the melter (whoops). My sweet boy doesn't understand 'why not food if food shaped.' But, candidly, I'm not overly concerned, because (1) the wax doesn't have fragrance oil or anything else in it, (2) it's not a daily occurrence, and (3) he's the size of a moose.

But I think this is probably a "do as I say, not as I do" situation. Despite what the accused may claim, candle wax is not a sweet treat.

Pet parent guidance: Keep unlit candles, wick trimmings, matches, anything with fragrance, and candle-care accessories somewhere your pet cannot snack on them.

Confusing Candle Buzzwords

Pet-Safe

Just consider the phrase, "pet-safe."

Safe for what pet? A healthy 80-pound dog? A teensy newborn kitten? A hamster with asthma? A hundred-year-old turtle who eats pizza and saves the world? Safe under what conditions? One candle burning in a ventilated living room? Eight candles burning in a closed bedroom? Safe to smell? Safe to lick? Safe to eat?

Sure, common sense exists, but THAT'S NOT HELPFUL. And the same skepticism should apply to sweeping terms like “clean,” “natural,” and “non-toxic.” These words make me uncomfy, because they come across as vague pacifiers that just raise more questions.

So when you see one, investigate what it actually means for that specific candle or company. What ingredients are being discussed? What's been excluded? What standards are being followed? Has the finished candle been burn-tested? Is the company actually giving you meaningful information?

That is precisely why I don't use the term “pet-safe.” I can tell you what I make. I can tell you how I test it. I can tell you how I recommend using it. But I can't tell you that every candle will be appropriate for every animal in every household/farm/zoo/space station.

Anyone making that promise deserves at least one raised eyebrow.

Non-Toxic

If you've ever searched for a “non-toxic” candle, you've probably been hit over the head with a small dictionary of reassuring promises: natural, clean, paraffin-free, phthalate-free, made with essential oils, lead-free, no VOCs, carcinogen-free, sustainable, toxin-free, blah, blah, blah. Some of these accolades were invented by a marketing firm, while others can actually be useful to know.

'Clean' and 'natural' usually translate to diddly squat.

But, for example, 'phthalate-free' is an important one around here (especially as a candle maker with endometriosis). Phthalates are a family of chemicals that have raised legitimate health concerns in recent years (particularly around endocrine and reproductive effects), so if a candle maker (hi, it's me) has intentionally chosen fragrance formulations without phthalates, that's useful information.

In fact, I meticulously source ingredients from North American suppliers who prioritize and invest in safety and scientific research.

Despite what people may tell you, they do exist. These labs screen their formulations using established safety and toxicological standards, provide Safety Data Sheets and IFRA documentation, and through constant testing, evaluate ingredients for concerns including phthalates, carcinogens, mutagens, reproductive toxins, organ toxins, acute toxins, and California Prop 65-listed ingredients. What's more, they have their finger on the pulse of the chemical safety industry, so, as new research becomes available, their standards continue to evolve. We love nerdy chemists.

But collecting the most scary-sounding 'free-from' claims still doesn't make a candle completely pet-safe or non-toxic. Annoying, isn't it? It's muddled and complex and, for lack of a better phrase, really fucking stupid. It takes knowing what to watch for, and it doesn't hurt to find a candle-maker you trust. Which is why I wanted to write this in the first place, because whether you invest in a Starlight & Sage Co. candle or not, you should be armed with information to confidently make that decision for yourself.

No one should have to get a degree in chemistry, candle-making, and veterinary sciences to enjoy a damn candle in a home they share with their pets.

Now that we've talked risks and buzzwords, let's take our Magic School Bus on an adventure inside a candle. Did they ever do a candle episode? If not, someone please call Lily Tomlin posthaste. She's a national treasure, and this is a neeeeed.

Candle Ingredients

Wax

Remember earlier when we talked about emissions being a part of combustion (literally every candle does it)? Well wax vapor is one of those emissions, so what's in the wax could end up in the air you (and your pets) breathe.

I. Paraffin Wax

Paraffin wax is used because it's cheap and generally provides a stable burn. But, remember, just because a candle has passed industry burn standards does not mean it's medically safe to use. Paraffin is derived from petroleum (crude oil) and, when burned, can release VOCs (volatile organic compounds) like benzene and toluene. Those compounds have legitimate health concerns associated with them, which is one reason you may see “paraffin-free” marketed as shorthand for “non-toxic.”

Do I use paraffin wax? No. But, take all of this with a grain of salt. If you or your parents burned candles around the house in the '90's (hi, Yankee candle), you've probably been around a paraffin candle. They're still really common, and I haven't found sufficient veterinary evidence that proves burning a properly formulated paraffin candle around a healthy dog or cat is inherently toxic. But between the headaches I get around paraffin candles and what I know about petroleum products, avoiding it is still the right choice for my home and the candles I make.

II. Vegetable Waxes, Beeswax, & Other Alternatives

Common alternatives to paraffin generally include soy, coconut, palm, apricot, and beeswax. These can be blended to bring out specific attributes that candle makers want to achieve with their candles (burn time, melting point, scent throw, etc.). And while I have my preferences, available research does not give a scientifically responsible basis for declaring one natural wax "pet-safe" simply because it comes from organic soybeans, coconuts, bees, or otherwise.

There are plenty of claims floating around that one natural wax is "better" than another. Hell, even I have my opinions. But it's a spectrum, and it truly depends on your priorities. For example, if a vegan candle is important to you, avoid beeswax. If you have a coconut allergy, you probably shouldn't risk burning a coconut wax candle. Because a high majority of soy wax is produced using GMO-farmed soybeans, if non-GMO is a priority, look for 100% organic soy wax certification.

Starlight & Sage Co. candles contain no paraffin and no soy. I created a coconut-apricot-beeswax blend because it was important to me. Reasons being...

I have a soy allergy and endometriosis, and those attributes contribute to certain sensitivities;
I used to work in the energy industry and understand enough about hydrocarbons to know that I never want petroleum-based paraffin wax in my home;
I was a beekeeper and fell in love with making beeswax candles (it's also got a higher melt point, which helps extend burn time!);
And despite the steep learning curve, I simply love the way my blend looks/feels/performs.

So, wax definitely matters, but it comes down to individual needs and preferences. To me, the way the wax performs with the other variables (wick, fragrance, etc.), and the care taken while burning, is of higher importance.

Pet parent guidance: Understand your wax options, and decide what works best for you and your animal. Pay attention to whether the finished product has been burn tested and thoughtfully formulated in line with your priorities (i.e. "paraffin-free").

Fragrance Oils

"Fragrance” is not a singular chemical but, rather, an umbrella term for formulations that can be made up of thousands of different natural and synthetic materials. It's often a catch-all on ingredient lists for perfumes and other scented products, which can introduce confusion and, understandably, suspicion.

A fragrance oil is a formulation of aromatic materials, which can be naturally derived, synthetic (made in a lab), or a combination of both. And neither natural nor synthetic tells you, by itself, whether something is safe.

Fragrance can be irritating to an individual animal without being categorically toxic. Veterinary toxicologists note that strong fragrances can cause watery eyes or runny noses, coughing, wheezing, drooling, nausea, or other respiratory irritation in some dogs and cats. So, responsible fragrance loads are important.

And just like with wax, petrochemicals are relevant here too. A 2024 review of the fragrance industry estimated that roughly 76% of perfumery ingredients by volume are currently derived from petrochemical sources (petroleum), with only about 24% coming from renewable resources. The fragrance industry is actively researching and developing ways to replace fossil-derived fragrance materials with renewable alternatives, which makes a priority like mine (i.e. avoiding petrochemicals wherever possible) increasingly more accessible.

Fragrance is also where many of those “free-from” buzzwords come into play. Phthalates, for example, have historically been used as solvents and fixatives in fragrance formulations. Every fragrance supplier I use screens for phthalates, carcinogens, mutagens, reproductive toxins, organ toxins, acute toxins, and California Prop 65-listed ingredients. From a pet-conscious perspective, those exclusions matter to me.

My fragrance suppliers must be transparent about their screening process, provide safety documentation, and be ethically aligned with my values. That doesn't automatically certify the finished candle as “pet-safe,” but when the option for candle-makers to formulate without an ingredient carrying an unnecessary hazard exists, it seems like a no-brainer. For pet parents, families, people with sensitivities, or anyone simply trying to reduce avoidable chemical exposures in their home, I think that's a perfectly reasonable request.

Pet parent guidance: Don't be afraid of the word “fragrance," but don't overlook it. Find candle makers who follow established safety standards and whose candle ingredients (or intentional lack thereof) are aligned with your priorities. Identifying phrases like "phthalate-free" and "Prop 65 Compliant" can help.

Essential Oils

Okay, but aren't essential oils safer because they're... natural? This is probably the biggest candle-ingredient misconception worth clearing up. Natural does not equal harmless.

Essential oils are highly concentrated plant extracts, and if you're a pet owner, you probably already have a running list of natural things you keep far away from your babies (e.g. grapes, lilies, chocolate, onions, etc.). Essential oils are no different. Veterinary toxicologists warn that certain essential oils can cause serious problems for pets through ingestion, skin exposure, or concentrated inhalation.

Cats deserve explicit consideration because they metabolize certain compounds differently than humans and dogs. Veterinary toxicology sources identify oils including tea tree, wintergreen, pine, peppermint, cinnamon, and some citrus oils among those associated with toxicity depending on the species, concentration, and route of exposure. That doesn't translate to 'every candle containing an essential oil is going to poison your pet.' It just means “made with essential oils” should never be treated as synonymous with “pet-safe” the same way “synthetic fragrance” does not automatically translate to dangerous.

Despite what's usually a noble pursuit, 100% essential oil candles can run into limitations beyond pet safety concerns. These may include poor scent throw (struggles to fill a room), heat instability (a distorted smell or burnt odor), and high costs (expensive raw materials and limited scents).

Organizations like the International Fragrance Association maintain standards restricting, prohibiting, or establishing concentration limits for fragrance materials based on the latest safety data (heyo, a callback to our fabulous chemists!). So, you don't need to throw away your lemon-scented candles, for example, because not all lemon scents are made with or have a harmful concentration of citrus essential oils. But as a pet parent, it's important to know which scents you might need to approach with more caution.

Pet parent guidance: Be aware of scent notes and essential oils. If you have cats, take extra precautions when burning candles with any of the identified higher risk oils.

To address the candle-shaped elephant on the bus, some of my own Starlight & Sage candles carry scent notes like lemon, wintergreen, pine, etc. While every pet is different, none of my animals have ever reacted adversely to our candles, and I ensure they all adhere to safe fragrance loads. Despite that, taking precautions is nonnegotiable, so I always provide them a candle-free zone where they can retreat, if needed. And please trust that if any of my pets ever do react poorly to any fragrance, testing will stop immediately, and that fragrance oil will never be used/sold in a Starlight & Sage Co. candle. EVER.

Wicks

Two decades ago, it was common for cotton wicks to have lead cores (metal in the center to keep them upright). If you're over the age of 20, you’ve probably heard about the dangers of lead paint. For those in the dark, lead is insanely toxic. Don't use it, don't breathe it, and don't lick it. So burning it seems like a really bad idea. The U.S. Consumer Product Safety Commission banned the sale, manufacturing, and import of lead candle wicks in 2003. Another reason to love 2003. So yes, you absolutely want a lead-free wick. But I'm not going to frighten you into thinking an already-banned lead wick is lurking inside every candle on the shelf. These days, the most common core materials for wicks are cotton, paper, zinc, or tin.

Non-cored wicks, on the other hand, are usually made from woven natural fibers of cotton, hemp, or linen and dipped in either paraffin or a high-temperature natural wax for stability. The type of wax used isn't always disclosed beyond that distinction. Avoiding this ambiguity altogether is another non-negotiable for me.

So, I use wooden wicks in my candles. Another fun learning curve (literally every wick is different), but it's so, so worth it. But, even with wood wicks, sourcing still matters. Ours are certified by the Forest Stewardship Council (FSC), which means they're sourced from ethically managed forests that protect the environment, wildlife, worker, and community rights. They're eco-friendly, sustainable, and made from non-treated wood. We also plant a tree for every Starlight & Sage Co. order, with or without candles, because the earth deserves it. WE LOVE TREES.

Pet parent guidance: With the outlaw of lead wicks decades ago, there's really not much to worry about on this front. Wick choice is not likely to be a make-it-or-break-it variable on pet safety.

Embeds

Flowers, herbs, crystals, treasures...

Anything inside a candle that's not made of candle wax is usually referred to as an embed, and I have FEELINGS about this topic.

They can be really pretty, and pulling a crystal from the bottom of a melted wax pool might take you back to the days of yore, when you found toys at the bottom of the cereal box.

BUT STOP IT. RESIST. TURN BACK NOW.

Fire is a hungry queen, and she has no mercy. Very few things are "fireproof," and honestly? I kind of feel like you're getting cheated out of burn time. Like when they give you extra ice, and you end up with less cold brew? Leave the flowers, give me wax.

Anything placed inside a candle that can enter the melt pool or interact with the flame deserves a very high level of scrutiny. Dried botanical material is combustible. Many gemstones and crystals aren't intended to withstand the repeated heating conditions inside a burning candle. Plastic... need I launch into the FUMES speech? Even paper. God forbid an ember takes flight and lands on your new woven blanket where your precious baby snow leopard kitten is sleeping. Or a crystal explodes from the heat, and a shard pierces the only toy your puppy plays with. THE HUMANITY.

In all seriousness, ASTM candle-safety standards specifically address potentially flammable candle components and embeds because additional materials can affect fire behavior. Also they're dumb. Pretty but dumb. Pretty dumb.

If your candle contains a miniature dried meadow or a fairy rock garden, please re-home these innocent embeds. Burning them alive and drowning them in wax feels like bad karma.

Pet parent guidance: Let the candle be the candle. Wax only. NO EMBEDS.

Birds Are Different

Birds have remarkably efficient and sensitive respiratory systems, which also makes them particularly vulnerable to airborne contaminants and fumes.

I do not recommend burning scented candles in a bird’s shared airspace. The Merck Veterinary Manual specifically warns about household aerosols, fumes, perfumes, deodorizers, and candles around pet birds.

If you have a pet bird and want to use scented candles elsewhere in your home, check in with an avian veterinarian (that's a thing, right?) about your particular situation. Our feathered friends deserve their own candle rulebook (which I am far from qualified to write).

The Life of a Candlemaker with Five Pets

The studio where Starlight & Sage Co. candles are imagined, formulated, tested, poured, and wrapped is also home to a pack of four-legged creatures who mean the absolute world to me. So I'm fully invested in getting this right for both my business and my animals.

My own approach is wonderfully uncomplicated...

I ventilate. I don't close animals in rooms with candles, and when I'm done with a "closed-door-scent-throw-test" (very scientific), I flip on the fan and leave the door open. If it's nice enough, I may even open a window.
I supervise. A burning candle and an unattended pet do not need alone time together.
I keep candles out of reach. Particularly because my cats regard “out of reach” as a personal challenge. I know where they're likely to jump and where they're not, so I try to choose the places they don't bother or simply close them out of the room.
I burn candles properly. Wick trimming, wax care, burn time, draft control.
I pay attention. If one of my animals ever seems bothered by a fragrance, that fragrance would stop being used. Full stop.
I don't assume my experience applies to every pet. Making sure my pets are safe and happy is vital and does afford me experience on cohabiting candles/pets. However, my experience does not tell me how any other animal will react.
I share what I know. And I'm transparent about what I don't. It's what I would want if I was in your shoes.

The Pet Parent Candle Checklist

You absolutely CAN enjoy candles in a pet-filled home when you understand the risks and take the appropriate precautions. Every animal is different, so knowledge is power. Be aware of your pet, your environment, and who makes your candles.

Place burning (& unlit) candles out of reach of paws/snoots/enthusiastic tails, & never leave a burning candle unattended.
Burn candles in reasonably ventilated spaces, & allow your pet the ability to leave the scented space whenever they choose.
Scent responsibly. Be aware of the total amount of fragrance being used throughout your home.
Pay attention to how your pet reacts, & take appropriate action if any unusual behavior or symptoms appear (extinguish flame, open a window, call vet, etc.). Be especially vigilant with pets who have allergies or respiratory conditions.
Contact your veterinarian &/or animal poison control if your pet ingests candle materials.
Keep candle wicks trimmed in accordance with the candle maker's guidance, & extinguish flames that are visibly smoking or producing excessive soot.
Understand your wax options & what makes up a fragrance. Find candle makers who follow established safety standards & whose candle ingredients (or intentional lack thereof) are aligned with your priorities.
CAT PARENTS: If a candle contains essential oils, use extra caution with oils known to pose risks to cats (tea tree, wintergreen, pine, peppermint, cinnamon, some citrus oils, etc.)
BIRD PARENTS: Do NOT burn scented candles in a bird's shared airspace without first consulting your vet.

Candles, Pets, & Trusting Your Gut

I started researching this topic because I wanted a clear answer, and like anything else in life, it's a bit more complicated than that.

I empathize deeply with anyone who has dealt with a pet negatively reacting to a candle, simply because they weren’t given the information they needed. If that’s you, that experience was not your fault. I hope this post provides the information you were owed all along.

For most healthy dogs and cats, responsible candle use comes down to thoughtful placement, supervision, ventilation, proper burning, reasonable fragrance levels, and paying attention to your individual pet.

Some animals require more caution. Birds require substantially more. No ingredient, wax, wick, or marketing adjective eliminates those realities.

And that's the philosophy behind how I approach candles at Starlight & Sage Co. I would rather tell you what I know, what I do, and where the limitations are than stamp a reassuring "pet-safe" phrase on the label and call it foolproof. I have five furry reasons padding around my house as well as many lovely customers with pets of their own, so getting this right will always be an enormous priority.

Sources & Further Reading

Veterinary Toxicology + Pet Safety

Candle + Vessel Safety

Fragrance + Ingredient Standards

Indoor Air + Candle Emissions

Disclaimer: This article is intended for general educational purposes and is not veterinary advice. Your veterinarian is the best source of guidance for your individual pet, particularly if they have respiratory disease, known sensitivities, or possible exposure to a potentially harmful substance.

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