Suspect poisoning? US: ASPCA Poison Control (888) 426-4435 · UK: 01202 509 000 · Severe symptoms → nearest emergency vet now.

Could a few licks of an energy drink cause diarrhea or a skin reaction in my 7-pound dog?

Dogs · Food safety

Last reviewed: 2026-09-05 · Reference ranges: ASPCA, Pet Poison Helpline & Merck Veterinary Manual

Short answer

Yes, even a small amount can cause diarrhea or more serious problems. Energy drinks are toxic to dogs due to the combination of caffeine, taurine, and sugar, which can trigger a cardiac emergency. While diarrhea or skin irritation are possible reactions, the bigger risk is rapid heart rate, tremors, or seizures. This is an urgent situation; call your vet or the ASPCA Animal Poison Control Center at 888-426-4435 immediately.

Energy drinks — Food safety facts

Do not feed · Dogs · full breakdown on the linked food page

Caffeine, taurine and sugar together — a cardiac emergency in small pets.

Dogs and cats carry the same rating (Do not feed), so the notes below hold for either pet.

Energy drinks should not be given to dogs at all. Even a small amount can do harm, so there is no portion small enough to be safe.

Do not induce vomiting and do not give milk or oil to “dilute” it. Note the food and roughly how much was eaten, then call your vet or a pet poison hotline and follow their advice on whether to bring the pet in straight away.

Why these cautions matter

Caffeine overstimulates the heart and nervous system, and pets clear it so slowly that tremors and restlessness drag on far longer than they would in a person.

Added sugar brings empty calories, and over months that means weight gain and dental disease — both far harder to undo than to avoid.

The full verdict, portion guidance and serving notes are collected on the Energy drinks food facts page.

Open the full food page: Energy drinks food facts →