Is it toxic to dogs?
Aloe vera
Aloe vera · Asphodelaceae
Also called Aloe, Barbados aloe, Medicinal plant
Toxic to dogs
Severity: Mild
Yes. The ASPCA lists aloe vera as toxic to dogs. The plant contains saponins and anthraquinones that can cause vomiting, lethargy and diarrhea, although the ASPCA also notes the inner gel is considered edible.
- Toxic parts
- Leaves, especially the yellow latex under the skin
- Toxic compounds
- Saponins and anthraquinones (anthraquinone glycosides)
- Where you’ll find it
- House and garden
Signs of poisoning
- Vomiting
- Lethargy
- Diarrhea, which can be sudden and severe
Why it’s harmful to dogs
Aloe vera is the spiky, fleshy succulent that sits on kitchen windowsills and in sunny gardens in warm regions. Many people grow it for the soothing gel inside the leaves, which makes it feel like a harmless remedy plant.
For dogs, the picture is mixed. The ASPCA lists aloe as toxic to dogs, names saponins and anthraquinones as the toxic principles, and also states that the gel is considered edible. Merck Veterinary Manual places the problem compounds, anthraquinone glycosides, in the leaf latex, the yellow sap just under the skin of the leaf, with higher levels in younger leaves. Pet Poison Helpline describes them as purgatives, meaning they can trigger vomiting and diarrhea.
Merck says the usual treatment is supportive, with an excellent outlook. Dogs most often chew a leaf of a potted plant, or break one off a plant in the garden.
If your dog ate aloe vera
Move the plant out of reach and check how much was eaten. A small bite often leads to vomiting or diarrhea that passes, but call your vet or a poison helpline for advice. If you're in the US, ASPCA Animal Poison Control at (888) 426-4435 and Pet Poison Helpline at (855) 764-7661 are available (fees may apply); elsewhere, phone your local emergency vet. Never try to make your dog vomit yourself.
Offer fresh water and watch for lethargy or diarrhea that goes on, since ongoing diarrhea can leave a dog dehydrated. Those are reasons to see the vet the same day.
Keeping your dog safe
Keep aloe on a high shelf or in a room your dog can't enter, and don't leave broken leaves lying around. Outdoors, plant it in a raised container or behind a barrier.
Skip home remedies: ask your vet before putting aloe gel or juice on your dog's skin or giving it by mouth, whether it comes from a plant or a bottle. Teach "leave it" and keep chews handy. For a succulent look that is listed by the ASPCA as non-toxic to dogs, try Christmas cactus.
Dog-safe alternatives
Frequently asked questions
Is aloe vera poisonous to dogs?
Yes. The ASPCA lists aloe as toxic to dogs, with vomiting, lethargy and diarrhea as the signs. Pet Poison Helpline agrees.
Is aloe vera gel safe for dogs?
The ASPCA says the gel is considered edible, but the plant itself is listed as toxic. Ask your vet before using any aloe product on or in your dog.
Which part of the aloe plant is toxic?
Merck Veterinary Manual places the problem compounds in the leaf latex, the yellow sap under the skin of the leaf.
Is a little bit dangerous?
A small bite often causes only stomach upset. Merck Veterinary Manual describes the outlook as excellent with supportive care. Call your vet if your dog ate a lot or has ongoing diarrhea.
Written from veterinary sources by the Pawsplained editorial team. Not yet reviewed by a veterinarian; this is general information, not a diagnosis or treatment plan. Updated Oct 30, 2026. Editorial policy