The potato answer depends on preparation
Potatoes sit in the middle of the dog-feeding map: neither a superfood nor a poison when handled right, and genuinely risky when handled wrong. A peeled potato that has been boiled or baked until soft and served with absolutely nothing on it is safe for most dogs in modest amounts. The same vegetable raw, green-tinged, or sprouting is a different substance altogether. That split — cooked and plain versus raw and green — is the entire topic, and it is why the details of preparation matter more here than the vegetable itself.
Solanine: the raw and green potato hazard
Potatoes belong to the nightshade family, and like their relatives they produce a natural defensive compound called solanine. In a ripe, properly stored potato most of the solanine concentrates in the skin, the eyes, and any green patches that form when tubers sit in light — and cooking reduces but does not reliably eliminate it from a heavily green potato. Raw potato carries more of it, and it is also hard, dense, and difficult for a dog to digest. A dog who digs a raw potato out of a pantry bag or garden row can end up with vomiting, diarrhea, and lethargy from solanine, and green or sprouted potatoes raise that risk further. The practical rules are simple: never feed raw potato, cut away and discard any potato that is green or sprouting rather than serving it to anyone, and store the bag somewhere a determined dog cannot raid.
What cooked potato does and does not offer
Nutritionally, cooked potato is mostly starch — useful energy, a little potassium and vitamin C, but almost no protein and nothing a complete dog food does not already supply better. That makes it an occasional extra, not a dietary building block. It has one traditional use: plain boiled potato, sometimes paired with a bland protein, appears in short-term bland diets for dogs recovering from stomach upsets, because it is gentle and easy to portion. Outside that role, treat potato as filler calories. Dogs who are overweight or diabetic have the least room for a starchy add-on, and a serving that looks small on a dinner plate can be a large fraction of a small dog's day. A few forkfuls for a medium dog is a sensible ceiling.
The forms of potato to keep away entirely
Preparation decides safety at the table too. Mashed potatoes usually carry butter, milk, salt, and sometimes garlic — a combination that turns a safe base into a stomachache with a genuinely harmful ingredient folded in. French fries are deep-fried, salted fat. Potato chips are worse: thin, fried, heavily salted, and easy for a dog to eat in quantity straight from an unattended bag. Sweet potatoes, despite the similar name, are a different and generally more nutritious vegetable — but they follow the same cooked-and-plain rule, and their skins and raw chunks are choking and blockage risks.
When potato eating needs a vet
Contact your veterinarian if your dog eats raw potato in quantity, gets into green or sprouted potatoes, or develops repeated vomiting, diarrhea, unusual tiredness, or wobbliness afterward — those signs fit solanine's effects and deserve professional judgment rather than home waiting. A blockage concern also applies if a dog swallows a large raw chunk whole: watch for drooling, retching without producing anything, and refusal to eat. For the everyday version of this topic, noting 'potatoes only cooked, peeled, and plain, never raw or green' in KinsLe under Care Teams keeps the rule attached to your dog's feeding duties, so a family member making dinner on autopilot does not toss him a raw peeling or a green-skinned bake.