Can Dogs Eat Potatoes? Cooked Only, Never Raw or Green

Cooked Plain Potatoes Are Safe

Plain white potatoes that have been cooked until soft are safe for dogs and provide carbohydrate and some nutrition. A dog eating cooked plain potato as part of a balanced meal is fine. The cooking process is essential because heat denatures solanine.

The issue is raw potato, green potato, and potato preparation methods that include butter, salt, or other seasonings.

Solanine Is the Raw Potato Concern

Raw potatoes contain solanine, a glycoalkaloid compound that damages the digestive and nervous systems. Solanine causes vomiting, diarrhoea, abdominal pain, lethargy, and neurological signs like tremors or weakness.

Solanine levels vary depending on the potato. Green-tinged potato skin (from potatoes stored in light) contains significantly higher solanine than normal potato. A dog eating a raw green potato is at higher risk than a dog eating a raw white-fleshed potato, though both are unsafe.

Cooking denatures solanine, making it harmless. This is why cooked potatoes are safe while raw ones aren't.

Never Feed Raw Potato

The simple rule is never give raw potato to your dog, under any circumstances. Even a small amount could cause vomiting and digestive upset. A raw green potato is particularly dangerous.

If your dog eats raw potato, monitor for gastrointestinal symptoms over the next few hours. Contact your vet if vomiting or severe diarrhoea develops.

Green Potato Skin Is Highest Risk

Potatoes stored improperly or exposed to light develop a green tinge in the skin due to solanine production. This green colour is a visual warning that solanine content is elevated. Never feed potatoes with green skin or green areas to your dog, whether cooked or raw.

If you're cooking potatoes for yourself and notice green areas, remove them completely before cooking. Don't risk it.

The FDA DCM Investigation

Between 2018 and 2021, the FDA investigated grain-free dog foods linked to dilated cardiomyopathy cases. Potato starch (a common grain-free carbohydrate source) appeared frequently in these formulations. This raised questions about whether high potato content in boutique grain-free diets could contribute to heart issues.

For a dog eating occasional cooked plain potatoes as part of a normal, balanced diet, this is not a concern. The issue was dogs eating grain-free formulations where potato starch was the primary carbohydrate source, possibly affecting nutrient absorption or taurine bioavailability.

Sweet Potato Is Different

Sweet potato is a different food with a different nutritional profile. Sweet potatoes are generally more nutritious than white potatoes and lack the solanine concern. However, this article is specifically about white potatoes.

Preparation Methods Matter

Plain boiled or steamed potato is appropriate. Mashed potato is fine if it's plain (no butter, salt, or milk). Baked potato is acceptable if plain. Fried or roasted potato with added oil, salt, or seasonings is not appropriate.

Never give potato chips, french fries, or any processed potato product to your dog. These have excessive salt and fat.

Potato as a Grain-Free Carbohydrate

Some premium grain-free dog foods use potato starch as a carbohydrate source instead of grains. While potato starch itself isn't toxic, the FDA investigation raised questions about whether exclusive reliance on potato as the carbohydrate source in boutique formulations creates nutritional imbalances.

If your dog eats a commercially available grain-free diet with potato, you don't need to panic. Most formulations on the market have been adjusted since the investigation. However, discussing your dog's food with your vet is worthwhile if you have concerns.

Storage and Handling

Potatoes should be stored in a cool, dark place (not light exposure). Regular white potatoes stored properly won't develop green areas. If you notice green areas when preparing potatoes, discard those areas completely.

The Solanine-Tomato Connection

Tomatoes and eggplant also contain solanine (though in lower concentrations than raw potatoes). The same caution applies. Raw tomatoes or eggplants should be avoided. If your dog eats cooked plain vegetables, solanine isn't a concern.