Can Dogs Eat Sweet Potatoes? Cooked, Raw, Skins and Casserole

Yes. Plain, cooked, peeled sweet potato is fine for most dogs as an occasional treat. The ASPCA's own poison-control experts suggest it as a Thanksgiving mix-in. The trouble starts when sweet potato meets butter, sugar, marshmallows and pie crust, or when it becomes most of what a dog eats.

This guide covers what's in sweet potato, what the FDA's heart-disease investigation actually looked at, how much a dog can have, and which Thanksgiving versions to keep off the floor.

Can dogs eat sweet potatoes?

Yes, if it's plain and cooked. The ASPCA Animal Poison Control Center lists the sweet potato plant, Ipomoea batatas, as "Non-Toxic to Dogs, Non-Toxic to Cats, Non-Toxic to Horses" (ASPCA, Sweet Potato Vine). Its Thanksgiving advice goes further: "If you want to treat your pet to something special this Thanksgiving Day, try mixing some pieces of turkey, sweet potatoes and green beans into their usual dinner" (ASPCA, Thanksgiving Safety Tips, 2025).

The same page starts with a caveat: "While we recommend sticking to your pet's normal diet on Thanksgiving". Both lines hold. Sweet potato itself isn't the problem. What's mixed into it, and how much of it the dog gets, is.

Treat it as a treat. The World Small Animal Veterinary Association says "Treats should never replace a meal – every dog needs a complete and balanced diet" (WSAVA, Feeding treats to your dog, 2024). Our guide to whether dogs can eat turkey covers the other half of the ASPCA's Thanksgiving bowl.

Are sweet potatoes good for dogs?

They're a reasonable plain treat, not a superfood. USDA FoodData Central lists boiled, peeled sweet potato at 76 calories, 2.5 g of fibre and 0.14 g of fat per 100 g (USDA FoodData Central, boiled sweet potato). Baked in its skin, it has 90 calories, 0.15 g of fat, 6.48 g of sugar and 3.3 g of fibre per 100 g.

Sweet potato is also rich in beta-carotene, the orange pigment. The Merck Veterinary Manual says "Beta-carotene is a precursor of vitamin A found in plants, and dogs can readily use plant and animal sources of vitamin A" (Merck Veterinary Manual, Nutritional Requirements of Small Animals, 2024). A dog on a complete commercial food already gets the vitamin A it needs.

Do sweet potatoes cause heart disease (DCM) in dogs?

Not on the evidence so far. In 2018 the FDA began looking into reports of dilated cardiomyopathy (DCM), a heart muscle disease, in dogs eating certain foods. It was investigating complete dog foods that contained "a high proportion of peas, lentils, other legume seeds (pulses), and/or potatoes in various forms (whole, flour, protein, etc.) as main ingredients (listed within the first 10 ingredients in the ingredient list, before vitamins and minerals)" (FDA, Investigation into Potential Link between Certain Diets and Canine Dilated Cardiomyopathy, 2019).

Source: US FDA, Center for Veterinary Medicine, DCM investigation update (June 2019).

The FDA's newer questions-and-answers page talks about pulses and doesn't mention potatoes at all: "Most of the diets associated with the reports of non-hereditary DCM have legume seed ingredients, also called "pulses" (e.g., peas, lentils, etc.), high in their ingredient lists" (FDA, Questions & Answers: FDA's Work on Potential Causes of Non-Hereditary DCM in Dogs, 2024). It says it has "no definitive information indicating that the diets are inherently unsafe and need to be removed from the market", and it has stopped issuing public updates until there's meaningful new science.

The research since then points mainly at peas. A Tufts University study of the chemistry of DCM-linked diets found "Of these ingredients, peas showed the greatest association with higher concentrations of compounds" in the suspect diets. Sweet potatoes weren't cleared, but they couldn't be tested: "potatoes and sweet potatoes were insufficiently represented in either diet type" to evaluate (Smith et al., Scientific Reports, 2021).

The newest large dataset cuts the other way. A 2026 analysis of the Dog Aging Project, which follows thousands of pet dogs, found "Several modelling methods failed to find a statistically significant association between grain-free status of the diet and any cardiac diagnosis" (O'Brien et al., Veterinary Medicine and Science, 2026). Those were owner-reported heart diagnoses of any kind, not scans confirming DCM.

So a spoonful of plain sweet potato on top of a complete food isn't what anyone investigated. Whether a whole diet built on potatoes carries a risk is still open, and the stronger signal is for peas. If you're worried about your dog's food, talk to your vet before changing it.

Can dogs eat raw sweet potato or sweet potato skins?

Cook it and peel it. We found no veterinary manual or vet school that addresses raw sweet potato in dogs specifically. The American Kennel Club's advice is: "You should never feed your dog a raw sweet potato. Not only are they difficult to chew, but they can upset your dog's stomach and potentially cause intestinal blockage." On skins, the AKC says "leaving the skin on makes it harder for your dog to digest" (AKC, Can Dogs Eat Sweet Potatoes?, 2026).

Raw chunks are hard to chew. Cook sweet potato soft and peel it before sharing.

No source calls raw sweet potato or its skin toxic. The concern is hard pieces. WSAVA's treat guide says "Ensure that any treat offered is an appropriate size and shape to reduce the risk of choking." We searched the veterinary literature and found no published case of a sweet potato blockage in a dog, but that doesn't mean it can't happen.

How much sweet potato can a dog eat?

Less than a serving you'd give a person. WSAVA's rule covers all treats together: "Treats should always make up less than 10% of a dog's daily calorie intake." Its table turns that into calories. A 22 lb (10 kg) dog's whole daily treat allowance is 47 calories, and a 44 lb (20 kg) dog's is 79.

Figures calculated by Pet N Pet from WSAVA's treat-calorie table and USDA FoodData Central (boiled sweet potato, 328 g per mashed cup, 76 calories per 100 g). This is a ceiling for all treats combined, not a serving suggestion.

Calculated by Pet N Pet from WSAVA's treat guide (2024) and USDA FoodData Central. A ceiling for all treats combined, not a serving suggestion.

Plain, mashed and unseasoned is the form to share.

Don't make it the main food. In a published case from Korea, "The dog was exclusively fed boiled sweet potato (Ipomoea batatas) as a primary diet source for 4 weeks" and developed thiamine deficiency with seizures. It recovered with thiamine and a normal diet (Song and Jung, Veterinary Medicine and Science, 2021). The problem was a diet with nothing else in it, not the sweet potato itself.

Can dogs eat sweet potato casserole, pie or candied yams?

Skip them. The extras change sweet potato completely. Per 100 g, USDA data put plain boiled sweet potato at 76 calories, 0.14 g of fat and 5.74 g of sugar. Home-made candied sweet potato has 164 calories, 3.54 g of fat and 27.2 g of sugar. That's about 25 times the fat and nearly 5 times the sugar.

Butter, sugar and marshmallows turn a plain vegetable into a rich dessert.

The rest of the table is worse. Sweet potato pie has 269 calories, 9.75 g of fat and 25.16 g of sugar per 100 g, and restaurant sweet potato fries have 305 calories, 23.93 g of fat and 11.47 g of sugar. Marshmallows are 318 calories, 0.2 g of fat and 57.6 g of sugar per 100 g. One regular 150 g slice of sweet potato pie is about 404 calories, 8.6 times a 22 lb dog's whole daily treat allowance.

Source: USDA FoodData Central (SR Legacy and FNDDS), retrieved October 2026.

Fat is the main worry. The ASPCA warns that "Feeding foods that are high in fat to dogs can lead to pancreatitis, an inflammation of the pancreas." The Merck Veterinary Manual names "eating trash, large amounts of table scraps, or other inappropriate food" as a common risk factor (Merck Veterinary Manual, Pancreatitis and Other Disorders of the Pancreas in Dogs, 2024). Our post on whether table scraps are safe for dogs goes further.

What about the spices? Pet Poison Helpline says "The small amount of nutmeg used in recipes is very unlikely to cause serious toxicity, though mild stomach upset could occur if a small amount is ingested" (Pet Poison Helpline, Nutmeg and Cinnamon Toxicity, 2026). The fat and sugar are the bigger reasons to skip the casserole.

Canned "yams" are usually sweet potatoes. University of Illinois Extension notes that "Today the USDA requires that when the term 'yam' is used to describe sweet potatoes, it must also be labeled as a 'sweet potato.'" (University of Illinois Extension, 2019). Canned in syrup, they carry 15.4 g of sugar per 100 g, about 2.7 times plain boiled sweet potato. Plain cooked sweet potato is the better choice.

If your dog ends up with a sticky marshmallow muzzle after a counter raid, our Biobased Pet Wipes handle the clean-up.

Does sweet potato help with diarrhoea, and is it better than pumpkin?

We found no trial of sweet potato for diarrhoea or constipation in dogs. For diarrhoea from colitis, the Merck Veterinary Manual lists different fibre sources: "Supplementing the diet with fiber (1–6 teaspoons of psyllium hydrophilic mucilloid or 1–4 tablespoons of coarse wheat bran/feeding), or feeding a commercial high fiber diet, improves diarrhea in many animals with colitis" (Merck Veterinary Manual, Colitis in Small Animals, 2025). Sweet potato isn't on that list.

Diarrhoea that lasts, comes with blood or vomiting, or affects a puppy needs a vet, not a vegetable. See our guide to signs of diarrhoea in dogs.

Which dogs should skip sweet potatoes?

Three groups should check with their vet first.

Diabetic dogs. For a dog on insulin, any unplanned food upsets a matched routine. The Merck Veterinary Manual's advice to owners is "Do not make changes in the amount or timing of insulin treatments or diet without consulting your veterinarian" (Merck Veterinary Manual, Disorders of the Pancreas in Dogs, 2026). You'll see sweet potato called both "high" and "low" glycemic online. The only data we found are from people, where boiling gave a much lower value than baking (Bahado-Singh et al., Journal of Nutrition and Metabolism, 2011). We found no dog study.

Dogs with calcium oxalate bladder stones. A 2026 veterinary journal article by Texas A&M vets says high-oxalate foods "(e.g., peanuts, tofu, spinach, sweet potato) should therefore be avoided" in these dogs (Cook and Atiee, Today's Veterinary Practice, 2026). That advice is for dogs with a stone history, not healthy dogs.

Dogs on a weight plan or a vet diet. Sweet potato is calorie-dense for a treat, and a prescription diet only works if it's most of what the dog eats.

Is the sweet potato vine poisonous to dogs?

No. The ASPCA lists the sweet potato vine as non-toxic to dogs. Its garden lookalike is a different story. Morning glory belongs to the same plant genus, Ipomoea, and the ASPCA lists it as "Toxic to Dogs, Toxic to Cats, Toxic to Horses", with vomiting as a sign and a note that large amounts of seeds may cause hallucinations (ASPCA, Morning Glory). If you grow ornamental vines, it's worth knowing which is which.

The ornamental sweet potato vine is non-toxic to dogs. Morning glory, in the same genus, is not.

Throw out mouldy sweet potatoes rather than composting them where your dog can reach. Merck's advice for dogs is that "Control of tremorgenic mycotoxin exposure hinges on preventing animals' access to moldy foods, feeds, and food waste, including compost."

What to do if your dog raids the Thanksgiving table

1.  Move your dog away and pick up what's left.

2.  Check the labels of anything sugar-free or "keto" for xylitol or birch sugar. If you find it, go to your vet or an emergency clinic straight away.

3.  Note what and how much your dog ate, and roughly when.

4.  Call your vet or ASPCA Animal Poison Control on (888) 426-4435, where "A consultation fee may apply." Pet Poison Helpline is on (855) 764-7661 and charges "a $89 USD per incident fee."

5.  Watch for vomiting, not eating, belly pain or diarrhoea over the next few days, and call your vet if you see them.

Picking up after your dog is the easiest way to keep an eye on things for a day or two. Our dog poop chart shows what's normal, and a roll of poop bags by the door makes it routine. For the rest of the holiday table, see our guide to holiday food dangers for pets.

Frequently Asked Questions

Can dogs eat sweet potato skins?

Peeling is the safer choice. The AKC says leaving the skin on makes sweet potato harder for dogs to digest, though no source calls the skin toxic. Cook the sweet potato soft, peel it, and cut it small or mash it, in line with WSAVA's advice that treats be an appropriate size and shape.

Can I give my dog sweet potato every day?

A small plain amount can fit, as long as all treats stay under 10% of daily calories, as WSAVA advises. For a 22 lb dog, that whole daily allowance is about 3 tablespoons of mashed sweet potato. Don't make it a main food: a dog fed only boiled sweet potato for four weeks developed thiamine deficiency.

Is sweet potato or pumpkin better for dogs?

Per tablespoon, their fibre is similar, about 0.5 g for sweet potato and 0.44 g for canned pumpkin. Per calorie, plain canned pumpkin has more than twice the fibre, at about 8.5 g per 100 calories. Neither has a published diarrhoea trial in dogs, so ask your vet if your dog has ongoing stomach trouble.

Can diabetic dogs eat sweet potatoes?

Only if your vet agrees. The Merck Veterinary Manual tells owners not to change the diet or insulin timing of a diabetic dog without consulting the vet, because meals are matched to insulin doses. Online claims that sweet potato is high or low glycemic come from human studies; we found no dog data.

Are canned yams safe for dogs?

Canned "yams" in the US are usually sweet potatoes, often packed in syrup with about 15.4 g of sugar per 100 g, roughly 2.7 times plain boiled sweet potato. Plain cooked sweet potato is the better choice. Check any sugar-free version for xylitol, which is toxic to dogs.

The short version

Plain, cooked, peeled sweet potato is a fine occasional treat for most dogs, and the ASPCA even suggests it as a Thanksgiving mix-in. Keep it inside the 10% treat allowance, about 3 tablespoons for a 22 lb dog, and don't let it become the main food.

The FDA's heart-disease investigation was about complete diets built on peas, lentils and potatoes, not a spoonful on dinner, and the signal points mostly at peas. The real Thanksgiving risks are the casserole, the pie, the fries and anything sugar-free. If your dog gets into those, check labels for xylitol and call your vet.

Sources: the US Food and Drug Administration, the Merck Veterinary Manual, the ASPCA and ASPCA Animal Poison Control, the World Small Animal Veterinary Association, USDA FoodData Central, University of Illinois Extension, Pet Poison Helpline, the American Kennel Club and the peer-reviewed veterinary literature. Specific pages consulted are listed below.

This guide is general information, not veterinary diagnosis. If your dog is unwell, call your vet.

SOURCES & CITATIONS

ASPCA Animal Poison Control Center — Toxic and Non-Toxic Plants: Sweet Potato Vine, retrieved 2026-10-09 https://www.aspca.org/pet-care/aspca-poison-control/toxic-and-non-toxic-plants/sweet-potato-vine

ASPCA Animal Poison Control Center — Toxic and Non-Toxic Plants: Morning Glory, retrieved 2026-10-09 https://www.aspca.org/pet-care/aspca-poison-control/toxic-and-non-toxic-plants/morning-glory

ASPCA (ASPCA Poison Control experts) — Thanksgiving Safety Tips That Will Keep Your Pets Feeling Thankful This Holiday, 20 Nov 2025, retrieved 2026-10-09 https://www.aspca.org/news/thanksgiving-safety-tips-will-keep-your-pets-feeling-thankful-holiday

ASPCA — ASPCA Poison Control, retrieved 2026-10-09 https://www.aspca.org/pet-care/animal-poison-control