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 and Skoga, and three cats, Gandalf, Pippin, and Gimli. Every single Starlight & Sage candle is developed, tested, poured, packed, and inevitably inspected by at least one unpaid furry supervisor in that same home studio.

All candles (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 precautions and vague marketing. So, I got into ADHD-driven hyperfocus mode and started digging into veterinary guidance on candles, fragrance, essential oils, indoor air quality, and pets.

The good news is that for most healthy dogs and cats, candles and pets can happily coexist. But, as with everything, caveats exist. There are precautions worth taking, and some animals require considerably more safeguards. Even as someone inside this (very nice smelling) industry, some of the terms used 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. And, of course, I'll pop back in and update it as I learn more.

Just call me Ms. Frizzle.

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 fragrance chemistry, let’s acknowledge the tiny 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 no telling what they'll summon.

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' 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, follow the recommended burn time, and give the room some air. If your candle starts smoking, dancing like it's 1999, 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 your pet to tell you, quite reasonably, that they would like you to... ahem... fuck off. So even when a fragrance isn't causing systemic toxicity, an intensely fragranced environment can still be irritating or unpleasant to an individual pet.

Veterinary guidance recommends particular 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 or 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, packaging, anything with fragrance, and candle-care accessories somewhere your pet cannot snack on them.

Now, let's talk about the confusing candle buzzwords.

Pet-Safe

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?

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 be genuinely helpful.

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

But, for example, 'phthalate-free' is an important one around here (especially as someone 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 how to weed through the bullshit. 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 the 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. What's in the wax could end up in your air.

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. 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 personally get around paraffin candles and what I know about petroleum products, avoiding it is still the right choice for my own 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 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 us a scientifically responsible basis for declaring one natural wax pet-safe simply because it comes from organic soybeans, coconuts, or bees.

There are plenty of claims floating around that one natural wax is "better" than another. 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 soy wax is usually produced using GMO-farmed soybeans, if non-GMO is a priority, look for 100% organic 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
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 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 the 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, 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 systemically toxic. Veterinary toxicologists note that strong fragrances can cause watery eyes or 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, with only about 24% coming from renewable resources. The fragrance industry is actively researching 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. Those exclusions matter to me.

From a pet-conscious perspective, my fragrance suppliers must be transparent about their screening process, provide safety documentation, and be ethically aligned with my values. That doesn't magically 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 here.

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 mean harmless.

Essential oils are highly concentrated plant extracts, and if you're a pet owner, you probably already have a list of natural things you keep far away from your babies (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.”

Likewise, “synthetic fragrance” does not automatically translate to dangerous. Fragrance formulations can contain naturally derived and synthesized aromatic materials. In fact, 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. 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 (the 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. 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. Good job again, 2003. So yes, you absolutely want a lead-free wick. But I am not going to scare you into thinking an already-banned lead wick is lurking inside every candle on the shelf.

But not all wicks have metal cores. Non-cored wicks are usually made from cotton and dipped in either paraffin or a high-temperature "natural" wax. Usually the type of wax used isn't disclosed beyond that distinction.

Avoiding this altogether was another non-negotiable for me. So, I chose to use only 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.

Our wood wicks are certified by the Forest Stewardship Council (FSC), which means they're ethically sourced from responsibly managed forests that protect the environment, wildlife, worker, and community rights. They're eco-friendly, sustainable, and are made from non-treated wood.

Pet parent guidance: With the outlaw of lead wicks decades ago, there's really not much to worry about here. 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.

Fire is a hungry queen, and she has no mercy. Very few things are "fire resistant," and honestly? I kind of feel like you're getting cheated out of burn time. Like when they give you extra ice, so you have 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 high level of scrutiny. Dried botanical material in particular 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 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 rehome them. Burning them alive and drowning them in wax feels like a bad omen.

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

Bird parents, you get your own section

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 about your particular situation. Our feathered friends deserve their own rulebook (which I am far from qualified to author).

My house has five pets & A LOT of candles. Here's what I actually do.

I share my home and studio with Theia, Skoga, Gandalf, Pippin, and Gimli.

That means the place where SSCo candles are formulated, tested, poured, and packed is also a place containing four-legged creatures who shed on things immediately after I clean them. They mean the absolute world to me.

My own approach is wonderfully unglamorous:

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 cats regard “out of reach” as a personal challenge. I know where they're likely to jump and where they're not. I choose the places they don't bother or 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 do not assume my experience applies to every pet. My five animals happily sharing a candle-filled home tells you why I care so deeply about this issue. My experience doesn't tell me how any other animal will react.

I'm transparent. It's what I would want if I was in your shoes. Not to mention, I want your furry babies safe and happy, too.

The Pet Parent Candle Checklist

You absolutely can enjoy candles in a pet-filled home. Here is the version worth remembering:

Never leave a burning candle unattended.
Keep burning and unlit candles out of reach of paws, snoots, toe beans, and enthusiastic tails.
Burn candles in reasonably ventilated spaces, and give your pet the ability to leave the fragranced space.
Follow the maker's wick and burn-care instructions.
Extinguish candles that are visibly smoking or producing excessive soot.
Consider the total amount of fragrance being used throughout your home.
Pay attention to coughing, wheezing, sneezing, watery eyes, unusual breathing, vomiting, drooling, lethargy, or behavioral changes.
Use additional caution with pets who have asthma, allergies, chronic bronchitis, or other respiratory conditions.
Do not assume essential oils are automatically safer because they're natural.
If a candle contains essential oils, use additional caution with oils known to pose risks to cats, including tea tree, wintergreen, pine, peppermint, cinnamon, and some citrus oils.
Don't burn scented candles in a bird's shared airspace.
Contact your veterinarian if your pet ingests candle materials or develops concerning symptoms.

Candles, pets, and a little common sense

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.

Thankfully, between veterinary guidance, science, transparency, and common sense, it doesn't feel nearly as scary a topic as when I started.

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 is really the philosophy behind how I approach candles at Starlight & Sage.

I would rather tell you what I know, what I do, and where the limitations are than stamp a reassuring phrase on the label and call the conversation finished. I have five furry reasons wandering around my house to care about getting this right.

Chances are, you have at least one, too.

Sources & Further Reading

Veterinary Toxicology + Pet Safety

Candle + Vessel Safety

Fragrance + Ingredient Standards

Indoor Air + Candle Emissions

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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