It’s an everyday household staple food, but can dogs have raw potatoes to eat? The quick answer is No — dogs should not have raw potatoes, and this is one of the clearest veterinary positions in this series. Purina’s veterinary team is unambiguous: dogs should never eat raw potatoes as they contain a substance called solanine which is potentially toxic to dogs. PetMD, reviewed by Dr. Sandra C. Mitchell DVM, DABVP, confirms that raw potatoes should be avoided. The position across all major veterinary sources is consistent — raw potato is not appropriate for dogs.
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Cooked potato is a different matter. Cooking significantly reduces solanine levels, and plain cooked potato in appropriate amounts is safe for most healthy adult dogs. The critical distinction is always raw vs cooked — and within raw, the worst varieties are green potatoes, sprouted potatoes, and potato skins.
Why Raw Potatoes Are Toxic to Dogs
Potatoes belong to the nightshade family (Solanaceae) — the same plant family as tomatoes, aubergines, and bell peppers. Like other members of this family, potatoes produce naturally occurring toxic compounds as a defence mechanism against insects and disease. In potatoes, the two primary toxic compounds are solanine and chaconine — both glycoalkaloids that affect the nervous system and digestive tract.
Solanine
Solanine is a cholinesterase inhibitor — meaning it blocks the enzyme responsible for breaking down acetylcholine, a key neurotransmitter. When acetylcholine builds up in nerve junctions due to this inhibition, the result is dysregulation of the nervous system and body organs. In dogs, solanine causes gastrointestinal irritation, nervous system effects, and in significant exposures, can affect heart rate and cause serious neurological symptoms.
Chaconine
Chaconine is a companion glycoalkaloid that acts alongside solanine. It causes direct irritation to the digestive tract, can produce nervous system symptoms including tremors, and at higher exposures causes kidney function disorders. The combination of solanine and chaconine in raw potatoes creates a more complex toxic profile than either compound alone.
Where These Compounds Are Most Concentrated
Not all parts of a raw potato are equally problematic:
Potato skin — contains the highest concentration of solanine of any part of the tuber. The skin should never be given to dogs either raw or cooked.
Green potatoes — when a potato is exposed to light and turns green, the chlorophyll development occurs simultaneously with a dramatic increase in solanine and chaconine concentration. A green potato is significantly more toxic than a pale, unexposed one. Never give dogs green potatoes in any form.
Sprouted potatoes — the “eyes” and sprouts that develop on stored potatoes contain particularly high solanine concentrations. These are the most toxic part of the potato plant available in a domestic kitchen. Never give dogs potatoes with sprouts.
Potato flesh (unexposed, non-green) — contains solanine at lower concentrations than skin, green areas, or sprouts. Still toxic raw — just lower concentration than the above.
Potato leaves, stems, and vines — the foliage of the potato plant contains solanine throughout and should never be accessible to dogs. If you grow potatoes, fence off the bed.
Symptoms of Solanine and Raw Potato Toxicity
Solanine poisoning in dogs presents with a range of symptoms that can affect both the digestive and nervous systems. Dial A Vet’s veterinary guidance notes that symptoms of solanine toxicity include vomiting, diarrhoea, lethargy, confusion, and changes in heartbeat.
Mild to moderate symptoms:
- Vomiting
- Diarrhoea
- Drooling
- Abdominal pain or cramping
- Lethargy
- Loss of appetite
More significant symptoms (larger exposures):
- Dilated pupils
- Confusion and disorientation
- Muscle weakness or tremors
- Changes in heart rate — both elevated and slowed
- Difficulty breathing
- In severe cases, paralysis
Symptoms can take several hours to develop after ingestion — meaning a dog that appears fine initially after eating raw potato may still go on to develop symptoms. If your dog has eaten raw potato, contact your vet even if they appear normal.
How Much Raw Potato Is Dangerous?
There is no established safe threshold for raw potato consumption in dogs — solanine concentration varies between potato varieties, growing conditions, storage, and whether the potato has greened or sprouted. This variability is precisely why Purina’s position is that dogs should never eat raw potatoes rather than “small amounts may be acceptable.”
A small nibble of plain raw potato flesh (non-green, non-sprouted) in a large dog is unlikely to cause serious harm — the dose would be below the threshold for significant toxicity. The same nibble in a small dog, or a similar amount from a green or sprouted potato, is a different risk profile entirely.
Dial A Vet advises: while potatoes do contain solanine, a dog would likely need to ingest a significant amount to experience severe symptoms from normal raw potato flesh. However, given the lack of an established safe dose and the unpredictability of solanine concentration, the precautionary approach — avoid raw potato entirely — is the correct one.
Cooked Potato — The Safe Alternative
Cooking dramatically reduces solanine levels in potatoes. Purina confirms that solanine levels are reduced when potatoes are cooked, making cooked potato safe for dogs — provided it is prepared appropriately.
Safe preparation for dogs:
- Baked or roasted — plain, without oil, butter, salt, or seasoning. Purina specifically notes that boiling is less effective at reducing solanine than other cooking methods — baking or roasting is preferable.
- Mashed — plain, without butter, cream, salt, garlic, onion, or any additions. Plain mashed potato with nothing added is safe for most dogs.
- Never: Fried, cooked with butter or oil (pancreatitis risk), cooked with salt (sodium overload), cooked with garlic or onion (toxic to dogs), or any seasoned potato dish from human cooking.
Potato skin — always remove: PetMD advises never giving dogs green or sprouted potato peels due to solanine content, and notes that even plain potato skin can be hard to digest and cause digestive upset. Remove the skin before cooking for your dog.
The FDA DCM Warning — Potatoes in Regular Diets
This is an important note for dog owners considering using potato as a regular dietary component rather than an occasional treat.
The FDA investigated a potential link between grain-free diets containing potatoes as a primary ingredient and dilated cardiomyopathy (DCM) — a serious heart condition — in dogs. While no definitive causal link was established, Cornell University College of Veterinary Medicine and Tufts University Cummings School of Veterinary Medicine both recommend that legumes and starchy vegetables including potatoes should not form the primary carbohydrate base of a dog’s regular diet.
This concern applies to regular dietary use of potato — not to the occasional small piece of plain cooked potato as a treat, which is not a concern. But for dog owners considering home-prepared diets that rely heavily on potato, veterinary nutritional guidance is essential.
Potato Products — What’s Safe and What Isn’t
Plain baked or roasted potato (no skin, no seasoning) ✅ — safe in small amounts as an occasional treat
Plain mashed potato (no additions) ✅ — safe in small amounts
Boiled potato ⚠️ — safe but Purina notes boiling is less effective at reducing solanine. Plain boiled potato without skin is acceptable but baked/roasted is preferable
Raw potato ❌ — never
Green or sprouted potato (any preparation) ❌ — significantly more toxic than regular potato. Never give green or sprouted potato in any form
Potato skin (raw or cooked) ❌ — too high in solanine and oxalates. Always remove before preparation
Chips / crisps ❌ — very high in salt and fat. Not appropriate
French fries ❌ — fried, high fat, high salt. Not appropriate. Pancreatitis and sodium overload risk
Mashed potato with butter, cream, garlic, or onion ❌ — the additions make it inappropriate. Garlic and onion are toxic to dogs
Sweet potato — a completely different plant from regular potato, with a different safety profile. Plain cooked sweet potato is generally considered safe for dogs in appropriate amounts. Covered in detail in a separate guide
How Much Plain Cooked Potato Can a Dog Have?
Potatoes are relatively high in carbohydrates — the 10% daily calorie guideline applies. Given the starchy, calorie-dense nature of potato, keep portions modest:
- Small dogs (under 10kg) — 1 to 2 tablespoons of plain cooked potato, occasionally
- Medium dogs (10–25kg) — 3 to 4 tablespoons, occasionally
- Large dogs (over 25kg) — a small handful, occasionally
Diabetic dogs should have cooked potato cleared with their vet — the high carbohydrate content creates significant blood sugar impact.
Can Puppies Have Raw Potatoes?
No — raw potatoes should never be given to puppies. Puppies are more sensitive to solanine than adult dogs. Plain, well-cooked potato without skin in very small amounts is acceptable for older puppies on solid food, but there are simpler, lower-risk treat options available.
Can Senior Dogs Have Raw Potatoes?
No — same rule applies regardless of age. Senior dogs with kidney disease should be particularly careful even with cooked potato due to the potassium and phosphorus content — check with your vet.
What to Do If Your Dog Ate Raw Potato
A small amount of plain, non-green raw potato flesh — healthy adult dog: Contact your vet for guidance. Even without immediate symptoms, monitoring instructions from a vet are appropriate given solanine’s delayed symptom onset. Provide fresh water.
Green potato, sprouted potato, or potato skin: Contact your vet immediately. The solanine concentration in green and sprouted potato is significantly higher than in normal potato flesh.
Any dog showing symptoms: Emergency. Contact your vet or emergency animal hospital immediately. Vomiting, diarrhoea, lethargy, confusion, tremors, or changes in breathing all require urgent veterinary assessment.
Emergency contacts:
- UK: Your vet or the Animal Poison Line (animalpoisonline.co.uk)
- US: ASPCA Animal Poison Control Center (888-426-4435)
The Bottom Line
Raw potatoes are never appropriate for dogs — Purina’s veterinary team, PetMD, and Dial A Vet all confirm this clearly. Solanine and chaconine in raw potato are toxic to dogs, and green, sprouted, or skin-heavy potato represents a particularly concentrated risk. Cooked potato — plain, without skin or seasonings, preferably baked or roasted rather than boiled — is safe in appropriate small amounts as an occasional treat for most healthy adult dogs.
If your dog has eaten raw potato, contact your vet. If the potato was green, sprouted, or they ate significant amounts of skin, treat it as an urgent veterinary concern.
Frequently Asked Questions
Can dogs have raw potatoes? No — raw potatoes contain solanine and chaconine which are toxic to dogs. Purina’s veterinary team is explicit that dogs should never eat raw potatoes.
What happens if a dog eats raw potato? Solanine toxicity causes vomiting, diarrhoea, lethargy, confusion, and in serious cases tremors, heart rate changes, and neurological symptoms. Contact your vet immediately.
Is cooked potato safe for dogs? Yes — plain, well-cooked potato without skin, butter, salt, or seasoning is safe for most healthy adult dogs in small amounts. Baked or roasted is preferable to boiled.
Are green potatoes more dangerous for dogs? Yes — significantly. Green potatoes contain dramatically higher solanine concentrations than pale, unexposed potatoes. Never give dogs green or sprouted potatoes in any form.
Can dogs eat potato skin? No — potato skin contains the highest solanine concentration of any part of the tuber and should never be given to dogs raw or cooked.
Can dogs have sweet potato? Sweet potato is a different plant entirely from regular potato and has a different safety profile. Plain cooked sweet potato is generally considered safe for dogs in appropriate amounts.
Sources:
- Purina — dogs should never eat raw potatoes as they contain solanine which is potentially toxic; solanine levels are reduced when potatoes are cooked (so long as they are not boiled); watch for vomiting, diarrhoea, or lethargy and contact vet if raw potato is eaten (purina.com): https://www.purina.com/articles/dog/feeding/can-dogs-eat/potatoes
- PetMD — Dr. Sandra C. Mitchell DVM, DABVP: avoid raw potatoes, green parts, and heavily seasoned dishes; potato skin can be hard to digest; never give green or sprouted potato peels due to solanine content (petmd.com): https://www.petmd.com/dog/nutrition/can-dogs-eat-potatoes
- Dial A Vet — raw potatoes contain solanine; dog would likely need to ingest significant amount to experience severe symptoms from normal flesh; symptoms include vomiting, diarrhoea, lethargy, confusion, and heart rate changes (dialavet.com): https://www.dialavet.com/vet-answers/post/dog-eating-raw-potatoes-6855
- ASPCA Animal Poison Control Center — solanine classified as a toxic glycoalkaloid in the nightshade family; potato plant foliage listed in toxic plant database (aspca.org)
- Cornell University College of Veterinary Medicine — FDA investigation into grain-free diets with potato as a primary ingredient and DCM in dogs; recommendation against potato-heavy diets (vet.cornell.edu)
For the safe cooked alternative, see our guides on safe vegetables for dogs — or browse the full Can Dogs Eat series for more guides on safe and unsafe foods for dogs. For dogs who love a starchy treat, our Can Dogs Eat Pumpkin? guide covers one of the safest and most vet-recommended options.