Why are raw potatoes bad for dogs?

Potatoes are nightshades, and the raw tuber — especially when green — contains solanine, a natural pesticide the plant makes. In dogs it can cause vomiting, diarrhea, lethargy and, in larger amounts, nervous-system signs. Cooking reduces solanine and makes plain potato safe.

My dog ate one small piece of raw potato. Should I panic?

A small bite of a normal, non-green potato usually causes at most mild stomach upset — raw potato is also just hard to digest. Watch for vomiting or unusual tiredness and call your vet if you see them, or if the potato was green.

Are potato peels and sprouts dangerous too?

Yes — solanine concentrates in the skin, the eyes and sprouts, and in any green areas. A dog that raids a bowl of peelings has eaten the most toxic part of the potato, so that's a call to the vet.

Can dogs eat cooked potatoes?

Yes — plain, fully cooked potato (boiled, baked or mashed without butter, milk, salt, onion or garlic) is fine for most dogs in modest amounts. It's the raw and green material that carries the risk.

Can Dogs Eat Raw Potatoes? Vet-Sourced Answer

Can Dogs Eat Raw Potatoes?

Toxic to dogs

No. Raw and especially green potatoes contain solanine, which can poison dogs. Plain cooked potato is a separate, dog-safe food.

Quick facts

Quick facts
Verdict	Toxic
Risky amount	No safe or toxic dose is established — treat any amount as a risk.
Key symptoms	Vomiting, Diarrhea, Drooling, Lethargy or weakness, Confusion or wobbliness (larger amounts)
What to do	If your dog ate green potato, a pile of peels, sprouts or potato plant parts, call your vet — solanine poisoning can affect the nervous system and heart and deserves a professional assessment.

Why raw potato is a problem

Potatoes belong to the nightshade family, and the raw plant defends itself with solanine and related glycoalkaloids. Concentrations are highest in the leaves and stems, in sprouts and eyes, in the peel — and in any potato that has turned green from light exposure. In dogs, enough solanine causes vomiting, diarrhea, drooling and lethargy, and larger amounts can affect the nervous system and heart. Raw potato is also simply hard on canine digestion, even before the toxin.

Cooking changes the picture completely: heat breaks down much of the solanine, which is why plain boiled or baked potato sits on the safe list while its raw form sits here.

The high-risk scenarios

Most incidents aren’t a dog stealing one raw chunk — they’re a raided compost bowl of peelings, a bag of forgotten, sprouting potatoes in the pantry, or garden dogs chewing potato plants. Those are exactly the green, sprouted, leafy parts where solanine concentrates.

What to do if your dog ate raw potato

For a small bite of normal potato, watch for stomach upset. For green potatoes, sprouts, peels in quantity or plant parts, call your vet with an estimate of the amount — and mention if your dog seems wobbly or unusually tired. If you want a root-vegetable treat instead, plain cooked sweet potato is the easy answer.

If your dog ate it

If your dog ate green potato, a pile of peels, sprouts or potato plant parts, call your vet — solanine poisoning can affect the nervous system and heart and deserves a professional assessment.

In the US you can also call the ASPCA Animal Poison Control Center at (888) 426-4435 (a consultation fee may apply).

Frequently asked questions

Why are raw potatoes bad for dogs?: Potatoes are nightshades, and the raw tuber — especially when green — contains solanine, a natural pesticide the plant makes. In dogs it can cause vomiting, diarrhea, lethargy and, in larger amounts, nervous-system signs. Cooking reduces solanine and makes plain potato safe.
My dog ate one small piece of raw potato. Should I panic?: A small bite of a normal, non-green potato usually causes at most mild stomach upset — raw potato is also just hard to digest. Watch for vomiting or unusual tiredness and call your vet if you see them, or if the potato was green.
Are potato peels and sprouts dangerous too?: Yes — solanine concentrates in the skin, the eyes and sprouts, and in any green areas. A dog that raids a bowl of peelings has eaten the most toxic part of the potato, so that's a call to the vet.
Can dogs eat cooked potatoes?: Yes — plain, fully cooked potato (boiled, baked or mashed without butter, milk, salt, onion or garlic) is fine for most dogs in modest amounts. It's the raw and green material that carries the risk.