Yes, dogs can eat potato -but only when it is cooked and served plain. Plain boiled, steamed, or baked potato without skin is safe for dogs in small amounts. Raw potato and green potato are not safe. Never serve potato prepared with butter, salt, cheese, sour cream, or any seasoning intended for human consumption.
Key Takeaways
- Cooked, plain potato (boiled, steamed, or baked) is safe for dogs in modest quantities.
- Raw potato contains solanine, a naturally occurring compound that is harmful to dogs.
- Green potato -including any part that has turned green -should never be fed to dogs.
- Potato skin is best avoided; it contains higher concentrations of solanine even when cooked.
- Potato is used as a carbohydrate source in many grain-free dog foods.
Is Potato Safe for Dogs?
Cooked plain potato is safe for dogs. It is a recognised carbohydrate ingredient in commercial dog food and appears in many complete recipes, particularly grain-free formulations where it replaces cereal grains as an energy source.
The important distinction is between raw and cooked. Raw potato belongs to the nightshade family (Solanaceae) and contains solanine -a natural glycoalkaloid that acts as the plant's defence mechanism. Solanine levels drop significantly with cooking, which is why cooked potato is safe and raw potato is not. The same logic applies to green potato: the green colour indicates chlorophyll production alongside elevated solanine, meaning any potato that has started to turn green should be kept away from your dog entirely.
Why Is Raw Potato Harmful to Dogs?
Raw potato contains solanine, which can cause gastrointestinal upset and, in larger amounts, more serious symptoms. Signs of solanine exposure in dogs may include vomiting, diarrhoea, lethargy, and in significant cases, neurological effects.
The risk is dose-dependent -a dog that sneaks a single small piece of raw potato is unlikely to come to serious harm, but it is not something to offer deliberately or repeatedly. If your dog has eaten a notable quantity of raw or green potato and is showing any signs of illness, contact your vet.
What Nutritional Value Does Potato Have for Dogs?
Potato is primarily an energy-providing carbohydrate. It is not a nutritional powerhouse in the way that animal proteins are, but it does contain some useful micronutrients:
|
Nutrient |
What It Contributes |
|
Starchy carbohydrate |
Provides digestible energy |
|
Vitamin C |
An antioxidant; dogs synthesise their own but dietary sources add to the pool |
|
Vitamin B6 |
Supports protein metabolism and neurological function |
|
Potassium |
Helps maintain healthy muscle and nerve function |
|
Dietary fibre |
Supports gut motility and digestive health |
|
Manganese |
A trace mineral involved in bone development and metabolism |
It is worth noting that dogs are facultative carnivores -they thrive on animal-based protein and do not require carbohydrates in the way humans do. Potato in a dog's diet is better understood as an energy source and a digestible carbohydrate, rather than as a vegetable to prioritise for its micronutrient content.
How Should I Prepare Potato for My Dog?
Plain and simple is the approach. Here is how to do it safely:
- Choose a fresh potato with no green patches, sprouts, or soft spots.
- Peel it -potato skin is best avoided as it retains higher concentrations of solanine even after cooking.
- Cook it thoroughly -boil, steam, or bake until soft all the way through. No underdone sections.
- Add nothing -no salt, butter, oil, milk, cheese, or seasoning of any kind.
- Allow it to cool completely before offering it to your dog.
- Serve in small pieces -cut into manageable chunks appropriate to your dog's size.
Mashed potato prepared for humans is not suitable, as it almost always contains butter, salt, and sometimes cream or milk. If you want to mash a portion for your dog, cook a plain piece separately and mash it with nothing added.
How Much Potato Can I Give My Dog?
Potato should be an occasional treat or a small addition to a meal, not a staple. FEDIAF (the European Pet Food Industry Federation) guidelines advise that any treats or additions should make up no more than 10% of your dog's daily calorie intake, with the remaining 90% provided by a nutritionally complete diet.
Potato is calorie-dense relative to most vegetables, so portions should be modest:
|
Dog Size |
Suggested Amount (cooked, plain) |
|
Small (under 10 kg) |
1–2 small cubes (roughly 20–30 g) |
|
Medium (10–25 kg) |
A small handful -around 40–60 g |
|
Large (over 25 kg) |
Up to 80–100 g |
Dogs that are overweight or being managed for blood sugar issues should have potato limited further or avoided altogether. Speak to your vet if you are unsure whether potato is appropriate for your dog's specific situation.
Can Dogs Eat Sweet Potato?
Sweet potato is a separate species entirely -it belongs to a different plant family (Convolvulaceae) and does not carry the same solanine concern as regular potato. Plain cooked sweet potato is safe for dogs and is nutritionally similar in that it provides digestible carbohydrate, along with beta-carotene, which the body can convert to vitamin A.
The same preparation rules apply: cooked, plain, no skin, no seasoning, allowed to cool before serving. Sweet potato also appears in a number of commercial dog food recipes for the same reasons regular potato does -it is a palatable, digestible carbohydrate source.
Can Dogs Eat Chips, Crisps, or Roast Potatoes?
No. These are all preparations intended for human consumption and carry ingredients that are harmful to dogs:
- Chips (takeaway or homemade) -cooked in oil and heavily salted. Excess salt can cause sodium poisoning in dogs, and the fat content is not appropriate.
- Crisps -very high in salt, often with added flavourings (some of which, like onion and garlic flavouring, are toxic to dogs).
- Roast potatoes -cooked in oil or fat with seasoning. Not suitable even if plain-looking on the outside.
- Potato wedges -usually seasoned with garlic, paprika, salt, or mixed spice blends before cooking.
The rule is straightforward: if it was prepared for a human to eat, do not share it with your dog. Prepare a separate plain portion if you want to include potato as a treat.
Is Potato Used in Commercial Dog Food?
Yes, widely. Potato is a well-established carbohydrate ingredient in dog food, particularly in grain-free recipes where it serves as an alternative energy source to wheat, maize, or rice. It is easily digestible when cooked and is well tolerated by most dogs, including those with sensitivities to cereal grains.
If you are looking for a grain-free diet for your dog -whether because of a confirmed grain sensitivity or a preference for a cereal-free recipe -the Naturo grain-free dog food range includes recipes that use potato as a carbohydrate source alongside quality animal protein. These are formulated to be nutritionally complete, so you do not need to supplement or add extras.
A Note on Grain-Free Diets and Cardiac Health
If you are considering a grain-free diet, it is worth being aware that research has looked at a potential association between grain-free diets (particularly those high in legumes, potatoes, and certain pulses) and a type of heart disease called dilated cardiomyopathy (DCM) in dogs. This research, which emerged from the US Food and Drug Administration (FDA) and associated studies, is ongoing and has not established a definitive causal link.
UK regulatory bodies and FEDIAF continue to monitor the evidence. If you have concerns about your dog's heart health or are considering a significant dietary change, speaking with your vet before switching is the right approach.
