Is Aloe Vera Poisonous to Dogs?

The toxic compounds in aloe vera:

• Anthraquinone glycosides (notably aloin)
• Anthracene
• Saponins

If your dog ate aloe vera, watch for:

• •Vomiting
• •Diarrhea
• •Lethargy
• •Change in urine color (reddish)
• •Anorexia / depression

Is the whole aloe vera plant toxic to dogs, or just part of it?

The harmful compounds are concentrated in the latex layer just under the leaf skin (the bitter yellow sap), where anthraquinone glycosides such as aloin act as purgatives. The clear inner gel is far less toxic, but dogs do not eat aloe neatly, so any ingestion of a leaf should be treated as exposure to the latex. Keep the whole plant out of reach.

What happens if my dog eats aloe vera?

Expect gastrointestinal upset: vomiting, diarrhea, lethargy, loss of appetite, and sometimes reddish-tinged urine. Signs are usually mild to moderate and self-limiting, but large ingestions or small dogs can become dehydrated. Call your vet or Pet Poison Helpline (855-764-7661) or ASPCA Animal Poison Control (888-426-4435) for guidance.

Can I use aloe vera gel on my dog's skin?

Topical use of pure aloe gel is sometimes done for minor irritations, but dogs commonly lick it off, which can cause the same GI upset as eating the plant. Do not apply any aloe product to your dog without veterinary direction, and avoid commercial gels that contain added alcohol, fragrances, or other additives.

• ASPCA Toxic and Non-Toxic Plants: True Aloe
• Pet Poison Helpline: Aloe Vera

Last updated 2026-06-25