Aloe Vera

Is aloe vera safe for dogs? The plant is not. The ASPCA lists aloe as toxic to dogs, cats and horses because the leaf contains saponins and anthraquinones, which cause vomiting, diarrhea and lethargy when chewed. The clear inner gel is a different story — the ASPCA notes it is considered edible — so a thin layer of pure gel on the skin is low risk, while a chewed houseplant or a medicated aloe product is not.

Most aloe questions come down to which part of the plant, and what else is in the bottle. Here is how to sort that out for dogs, cats and horses, including licking, itchy skin, wounds, fleas and the aloe products sold for horses.

Why Aloe Is Listed as Toxic

An aloe leaf has three layers: the tough green skin, a thin yellow layer of sap just under it (the latex), and the clear gel in the center. The ASPCA plant database lists aloe vera as toxic to dogs, cats and horses, names the toxic principles as saponins and anthraquinones, and lists the signs as vomiting (not in horses), lethargy and diarrhea. It adds that the gel is considered edible.

The anthraquinones concentrate in the latex. Pet Poison Helpline describes them as anthraquinone glycosides, which act as purgatives — strong laxatives. Aloin, the best-known of them, is the reason aloe latex was once sold as a human laxative. In 2002 the FDA ruled that aloe was not generally recognized as safe and effective as an over-the-counter stimulant laxative, and manufacturers removed it from those products.

So “aloe is toxic” and “aloe gel is fine” are both true. They are describing different parts of the same leaf.

Houseplant Ingestion: The Main Risk

The common scenario is a dog or cat chewing an aloe houseplant. Chewing the whole leaf delivers skin, latex and gel together. Signs described by the ASPCA, Pet Poison Helpline and PetMD include:

• Vomiting and diarrhea, sometimes severe

• Lethargy or depression

• Reduced appetite

• Tremors, in more serious cases

• Reddish urine, as reported by PetMD

Most cases are gastrointestinal and the concern is fluid loss, which matters most for small dogs, cats and very young or old animals. Keep aloe plants on a high shelf or in a room pets cannot reach, or choose a pet-safe houseplant instead.

Keeping Pets Away From Aloe Plants

• Put indoor aloe on a high shelf, a hanging planter or in a room your pets don’t use. Cats climb, so for a cat home, a closed room is safer than a high shelf.

• Outdoors, PetMD suggests fencing garden aloe with chicken wire or a barrier.

• Pick up broken or trimmed leaves right away. A cut leaf oozing yellow sap is the most irritating part of the plant.

• Store aloe lotions, after-sun gels and juices where you keep other medicines.

• Before bringing any new plant home, check the ASPCA toxic and non-toxic plant list.

Is It Safe for Dogs to Lick Aloe Vera?

A lick of pure inner-leaf gel is unlikely to cause more than, at most, a mildly soft stool, since the ASPCA considers the gel edible. The concern is everything else that may be on the skin:

• Gel scooped from a home plant often carries some yellow latex with it. Rinse the fillet and let the yellow sap drain off before using it.

• After-sun and first-aid gels often contain lidocaine or other numbing agents, alcohol, fragrance, dyes or preservatives. PetMD specifically warns about lidocaine in aloe products.

• “Natural” skin sprays sometimes include tea tree oil. The Merck Veterinary Manual warns that concentrated essential oils should never be applied directly to pets and that cats are especially at risk; tea tree oil can cause tremors, seizures and liver injury. See our tea tree oil entry.

If you use aloe on a pet at all, use a product that is pure aloe gel with nothing else, or one made for animals whose full ingredient list you have read, and apply it where they cannot easily lick.

Can I Put Aloe Vera on My Dog’s Itchy Skin?

A thin layer of pure gel on a small patch of mildly irritated or sun-pinked skin is a reasonable home comfort measure, and it is how aloe shows up in many pet grooming products. Keep expectations modest: the only controlled veterinary study we found on aloe for dog skin is a small one (covered below), so treat its value as soothing, not treatment.

The more important point is that itching has a cause. Fleas, allergies, yeast and bacterial infections all itch, and none of them are resolved by aloe. Our piece on allergies in dogs covers how to think about recurring itch, and why dogs lick their paws covers the most common version. Hot spots — raw, oozing, rapidly spreading patches — need a vet, not a gel. Supportive options that work from the inside, such as fish oil, and soothing topicals like coconut oil are worth discussing too.

How to Use Aloe Gel on a Dog

• Patch test first. ElleVet’s guide suggests a small dab on one spot and watching for 24 hours for redness or itch before wider use.

• Thin layer only. Rub in a small amount so it absorbs rather than sitting on the coat to be licked off.

• Stop the licking. Distract your dog until the gel has soaked in, or use a cone if needed, as Wag suggests.

• Keep it away from the eyes, nose and mouth.

• Skip aloe drinks and juices. ElleVet notes aloe juice can contain latex, the laxative part of the leaf. Don’t give any aloe by mouth unless your vet recommends a specific product.

The Dog Study You’ll See Cited

Some aloe articles point to a 2020 study in Veterinary World by Kamr and colleagues. It tested 20 percent and 40 percent aloe gel ointments against a gentamicin antibiotic ointment in dogs with staphylococcal pyoderma, a bacterial skin infection. The aloe groups showed lower inflammation markers, and the authors were enthusiastic.

Look closer and it is 20 dogs split into four groups of five, with no randomization or blinding described, using a compounded ointment rather than household gel. It is interesting, but it is not a reason to treat a skin infection at home. Pyoderma needs a vet.

Can I Put Aloe Vera Gel on My Dog’s Wound?

For a very minor scrape, rinsing with clean water matters far more than anything you put on it afterward. The Merck Veterinary Manual’s owner guidance on wound management focuses on stopping bleeding, rinsing the wound to flush out dirt and bacteria, and having any bite examined by a vet.

Skip aloe on anything deeper than a surface scrape, anything bleeding, any puncture or bite, and anything that looks red, hot, swollen or smells. Those need veterinary care. Do not use products containing alcohol on broken skin, and prevent licking — a dog licking a treated wound is ingesting whatever is on it.

Does Aloe Vera Get Rid of Fleas?

No. We found no veterinary evidence that aloe kills or repels fleas. It may soothe skin irritated by bites, but the fleas themselves need a vet-recommended flea preventive, used for every pet in the home, plus cleaning of bedding and floors. Home remedies that promise to replace flea control usually just delay it.

Dogs, Cats and Horses

Dogs are the species most likely to chew a plant or lick a treated spot. Pure gel topically is low risk; plant ingestion causes gastrointestinal upset.

Cats face the same toxicity listing from the ASPCA. Because cats groom constantly, anything applied to a cat’s coat will be swallowed, so topical aloe products are a poor fit, and cats are particularly sensitive to essential oils often blended into skin products. Keep aloe plants away from cats entirely. See cat safety for the broader picture.

Horses are also listed as sensitive to the plant, without the vomiting since horses cannot vomit. Horses do meet aloe in a different way: inner-leaf aloe juices and powders are sold as equine gastric supplements. The best study we found is a 2018 randomized, blinded trial by Bush, van den Boom and Franklin at the University of Adelaide, published in the Equine Veterinary Journal, comparing an inner-leaf aloe vera preparation (17.6 mg/kg twice daily) with omeprazole (4 mg/kg once daily) in 40 horses for 28 days. For squamous gastric disease, 56 percent of aloe horses improved and 17 percent healed, against 85 percent and 75 percent on omeprazole. The authors concluded aloe was inferior to omeprazole, and glandular disease cases were too few to analyze.

So aloe had some effect but did not match the standard treatment. Gastric ulcers are diagnosed by gastroscopy and managed by your vet; an aloe supplement is not a substitute. If you use one, choose an inner-leaf (decolorized) product without latex and tell your vet. For horse routines more broadly, see our hemp for horses collection.

What To Do If Your Pet Ate an Aloe Plant

• Remove any remaining plant and note roughly how much is missing.

• Offer water and watch for vomiting and diarrhea over the next several hours.

• Do not induce vomiting unless a vet or poison line tells you to.

• Call for advice if more than a nibble was eaten, if your pet is small, or if signs appear: your veterinarian, ASPCA Animal Poison Control at (888) 426-4435 (a consultation fee may apply), or Pet Poison Helpline at (855) 764-7661 ($89 per incident).

• If a product was swallowed rather than the plant, have the label ready — the other ingredients may matter more than the aloe.

How Vets Treat Aloe Poisoning

There is no antidote. Care is aimed at the stomach upset and the fluid loss that follows. The Animal Emergency and Referral Center of Minnesota lists fluid therapy, anti-nausea medication and a bland diet. Catster’s vet-reviewed guide for cats adds that a vet may induce vomiting or give activated charcoal soon after ingestion. Never do either at home without a vet’s instruction.

Timing matters too. Catster says signs in cats may appear 6 to 12 hours after chewing the plant, so a pet who seems fine at first still needs watching overnight. The same emergency center gives a useful rule of thumb: diarrhea with vomiting or loss of appetite should be seen within about 12 hours, and diarrhea alone within about 24 hours. Go sooner for tremors, weakness, red urine, or any small or very young or old pet. Catster notes that cats typically make a full recovery when treated promptly.

When to Call Your Veterinarian

Call for repeated vomiting or diarrhea, lethargy, tremors, reddish urine, or any cat that has chewed an aloe plant. Also call before using aloe on a wound, on a hot spot, on skin that is broken or infected, or for itch that keeps coming back. For horses, any gastric or colic concern goes to your vet before any supplement.

How It Fits With Hemp

Aloe and hemp do not overlap much. Hemp does not treat skin disease, wounds or ulcers. Where a daily hemp routine fits is general wellness, given with a meal — our serving guide has amounts by weight. If your dog is itchy, the most useful step is finding the cause with your vet; supportive nutrition like hemp seed oil can be part of a daily routine alongside that plan.

Frequently Asked Questions

Is aloe vera safe for dogs?

The plant is not — the ASPCA lists it as toxic to dogs. The pure inner gel is considered edible and is low risk on the skin. Medicated products with lidocaine, alcohol or essential oils are a separate concern.

Is aloe vera safe for cats?

The plant is toxic to cats too. Because cats groom everything off their coats, avoid topical aloe on cats unless your vet recommends a specific product.

Is it safe for dogs to lick aloe vera?

A lick of pure inner gel is unlikely to cause a problem. Licking yellow latex from a fresh leaf, or a product with lidocaine, alcohol or tea tree oil, is not. Apply where your dog cannot easily lick.

Can I put aloe vera on my dog’s itchy skin?

A thin layer of pure gel on a small, mildly irritated patch is reasonable. It soothes, it does not treat. Persistent or spreading itch needs a vet.

Can I put aloe vera gel on my dog’s wound?

Only on a very minor surface scrape, after rinsing with water. Deeper cuts, punctures, bites and anything infected need a vet.

Does aloe vera get rid of fleas?

No. There is no evidence it kills or repels fleas. Use a vet-recommended flea preventive.

What happens if my dog eats an aloe plant?

Expect possible vomiting, diarrhea and lethargy. Call your vet or a poison line if more than a nibble was eaten or signs appear.

Is aloe vera good for horses with ulcers?

In the one randomized trial we found, an inner-leaf aloe preparation improved some squamous ulcers but was clearly inferior to omeprazole. It is not a replacement for veterinary care.

How much aloe vera is toxic to dogs?

There is no published toxic dose. PetMD notes severity depends on how much was eaten, which part of the plant, and the size of the dog. A lick of pure gel is low risk; a chewed leaf is worth a call.

Can dogs drink aloe vera juice?

It’s best not to. Juices can contain latex, the laxative part of the leaf, plus sweeteners or preservatives. Only give an aloe product by mouth if your vet recommends one.

What should I do if my cat chewed my aloe plant?

Remove the plant, note how much is missing and call your vet or a poison line. Don’t make your cat vomit at home. Catster notes signs can appear 6 to 12 hours later, so keep watching overnight.

Can I put aloe on my cat’s skin?

Avoid it unless your vet recommends a specific product. Cats groom constantly, so anything on the coat gets swallowed, and the plant is listed as toxic to cats.