Potatoes are a pantry staple in almost every home, and curious dogs have a way of finding food that falls on the floor — or sniffing out the vegetable drawer entirely. So the question of whether dogs can eat potatoes is both common and genuinely important. The short answer is: it depends entirely on preparation. Cooked, plain potatoes are generally safe in small amounts. Raw, green, or heavily seasoned potatoes can cause real harm. Here is everything you need to know to keep your dog safe.

What Is Solanine and Why Does It Matter?

Solanine is a natural chemical compound produced by plants in the Solanaceae family — which includes potatoes, tomatoes, and eggplant — as a defense mechanism against insects and fungi. In potatoes, solanine is concentrated primarily in the skin, the eyes (sprouts), and any green parts of the flesh or skin. The greening occurs when a potato is exposed to light, which triggers chlorophyll and solanine production simultaneously.

For dogs, solanine acts as a cholinesterase inhibitor, disrupting normal nerve function. According to toxicology research published on PubMed (PMID 22381195), glycoalkaloids like solanine can cause gastrointestinal distress at lower doses and neurological symptoms at higher doses. Dogs are generally more sensitive to solanine than adult humans because of their smaller body mass and different metabolic pathways.

Symptoms of solanine toxicity in dogs include:

• Vomiting and diarrhea
• Excessive drooling
• Lethargy and weakness
• Loss of coordination or trembling
• Dilated pupils
• Slow heart rate
• In severe cases: seizures or collapse

The risk scales with the amount consumed and the dog's body weight, so a small dog eating even a modest piece of raw green potato faces greater risk than a large dog eating the same amount.

Raw Potatoes: Always Off the Menu

Even without any green coloring, raw potatoes pose two distinct problems. First, they still contain solanine — just at lower levels than green potatoes. Second, raw potato starch is difficult for dogs to digest, as their digestive systems are not optimized for processing large quantities of raw complex carbohydrates. This can lead to gas, bloating, and gastrointestinal discomfort even if the solanine level is not high enough to cause neurological symptoms.

The American Kennel Club advises against feeding raw potatoes to dogs for precisely these reasons. There is simply no nutritional benefit that justifies the risk when cooked potato is readily available and far safer.

Cooked Plain Potatoes: Safe in Moderation

When potatoes are properly cooked — boiled, baked, or steamed without any added salt, butter, oil, garlic, onion, or other seasonings — the solanine content drops significantly and the starch becomes digestible. Cooking breaks down the cellular structure of the potato and denatures much of the solanine, making plain cooked potato a reasonable occasional treat for healthy adult dogs.

The key word is plain. Mashed potatoes with butter and cream, French fries, chips, potato soup, and any seasoned preparation are not appropriate for dogs. High fat content stresses the pancreas, excess sodium strains the kidneys, and ingredients like garlic and onion are directly toxic to dogs.

For healthy dogs, a few small cubes of plain boiled or baked potato — think of it as no more than 10% of a daily meal — is unlikely to cause problems. However, potatoes are high in carbohydrates and provide relatively little protein, so they should never form a significant part of a dog's diet.

Potato Skins: Better to Avoid

Potato skins deserve their own warning. Even on a well-ripened, non-green potato, the skin contains a higher concentration of solanine than the flesh. Skins also accumulate pesticide residues more readily than the interior, and their tough fibrous texture can cause digestive irritation. While a small piece of skin from a baked potato is unlikely to cause a crisis in a large dog, it is not worth the risk — especially when the flesh alone is the safer choice.

The FDA DCM and Grain-Free Diets

Any discussion of potatoes and dogs must address the U.S. Food and Drug Administration's ongoing investigation into dilated cardiomyopathy (DCM) in dogs. Beginning in 2018, the FDA received a surge of DCM reports — a serious heart condition — in dogs eating grain-free diets that were high in potatoes, legumes, and other non-grain carbohydrate sources.

The FDA DCM investigation alert did not definitively establish causation, and the research — including a study reviewed in PubMed (PMID 31041449) — suggests the relationship is complex and may involve taurine metabolism, ingredient sourcing, or processing methods rather than any single ingredient. As of 2026, the investigation remains open and inconclusive.

However, the signal is strong enough that many veterinary cardiologists recommend limiting grain-free diets heavily based on potato and legumes, particularly for breeds already predisposed to DCM such as Golden Retrievers, Doberman Pinschers, and Boxers. If your dog is eating a grain-free food with potato listed as a primary ingredient, a conversation with your veterinarian is warranted.

Sweet Potatoes: The Better Alternative

If you want to offer your dog a potato-type vegetable, sweet potatoes are the superior choice. Despite the name, sweet potatoes are not closely related to regular potatoes botanically — they belong to the Convolvulaceae family rather than Solanaceae — and they do not produce solanine. They are also richer in beta-carotene, vitamin C, fiber, and potassium. We cover sweet potatoes in detail in our companion article on this site.

When to Call the Vet

If your dog has eaten raw potato, green potato, or potato skins and is showing any signs of distress, do not wait. Call your veterinarian or an emergency animal clinic immediately. You should also contact the ASPCA Animal Poison Control Center at 888-426-4435. Treatment for solanine toxicity may include induced vomiting if ingestion was recent, activated charcoal to limit further absorption, and supportive care for neurological or cardiovascular symptoms.