| Verdict for dogs | Caution |
| Severity | 2 / 5 — Mild — usually stomach upset; watch them. |
| Safe amount | A taste at most |
| Category | Vegetable |
| Source | VCA Animal Hospitals — pet health library; Merck Veterinary Manual · reviewed 2026-08-07 · confidence: high |
Plain cooked potato with nothing added is safe in small amounts. Raw potato and any green or sprouting parts are not — they contain solanine, which causes drooling, vomiting, weakness and heart-rhythm changes. Mashed potato is usually made with butter, milk, salt and often garlic.
Don't make it a habit. Watch for vomiting, diarrhea or a lost appetite over the next day and call your vet if it doesn't settle or your dog seems unwell.
Never induce vomiting and never give any medicine unless a vet tells you to — it can do more damage than the poison. What we will and won't tell you.
If you're sharing food because you want to treat them, a treat formulated for dogs does the job without the guesswork.
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Can cats eat potatoes? — Feed with caution to cats.
Not toxic, but be careful — potatoes aren't poisonous to dogs, and they come with caveats that matter. Plain cooked potato with nothing added is safe in small amounts. Raw potato and any green or sprouting parts are not — they contain solanine, which causes drooling, vomiting, weakness and heart-rhythm changes. Mashed potato is usually made with butter, milk, salt and often garlic.
Watch for: Drooling, vomiting or diarrhea; Lethargy and weakness; Dilated pupils; A slow heart rate. Some signs lag by a day — call, don't wait.
The safe amount is a taste at most, as an occasional treat rather than a daily habit. Large amounts mainly cause stomach upset; if that doesn't settle within a day, call your vet.