Cooked potato — Food safety facts
Feed with care · Dogs · full breakdown on the linked food page
Plain cooked potato (no skin, no green parts) is fine. Raw potatoes, green skin, eyes and sprouts contain solanine, which is toxic.
Short answer
Plain cooked potato (no skin, no salt or butter, no green parts) is safe and easy to digest in small amounts. Raw potatoes and the green skin, eyes or sprouts contain solanine, which is toxic and can cause vomiting, diarrhoea and nervous signs. If the potato is green or sprouting, do not feed it to your dog — or yourself.