Can Horses Eat Sweet Potatoes? Safe — But Not Regular Potatoes

Can horses eat sweet potatoes? Yes — and I wish I had known the full answer before I stood in my kitchen last fall holding a sweet potato in one hand and my phone in the other, frantically searching while my mare, Delia, watched me through the window like I was personally offending her by taking so long. The short answer is that sweet potatoes are safe for horses. The longer answer involves a distinction that I genuinely think could save a horse’s life if you don’t already know it. Regular potatoes are not safe. At all. And the two get confused constantly.

Sweet Potatoes Are Safe — Regular Potatoes Are Not

This is the section I should have started with, honestly. Probably should have just made this the headline in giant red letters.

Regular potatoes — the Russets sitting in your pantry, the Yukon Golds, the red-skinned ones you roast on a Sunday — belong to the nightshade family, Solanaceae. They contain a compound called solanine, which is toxic to horses. Solanine is a glycoalkaloid, and horses cannot safely process it. It causes gastrointestinal distress, neurological symptoms, and in significant quantities it can be fatal. This is not a “feed sparingly” situation. Regular potatoes should not be fed to horses at all, in any amount, cooked or raw.

Sweet potatoes are a completely different plant. They belong to the family Convolvulaceae — the morning glory family. No solanine. No nightshade connection. The name is where the similarity ends. Botanically, a sweet potato and a Russet potato are about as related as a carrot and a tomato. Same category in the grocery store. Completely different biology.

I made the mistake once of assuming that because both were “potatoes,” the rules were basically the same. They are not. If you’ve ever tossed a piece of leftover baked potato to a horse thinking it was a harmless snack, please stop doing that. The risk is real.

One more thing worth flagging here — potato plant leaves and green-tinged potato skins have even higher solanine concentrations than the flesh. If your horses have access to a garden where potatoes grow, that’s worth addressing.

How Much Sweet Potato Can a Horse Have?

So you’ve got a sweet potato and a horse who is very interested in it. Here’s what the numbers actually look like.

A reasonable serving size is about half a medium sweet potato — roughly 65 grams, or about 2.5 ounces. That portion contains approximately 5 grams of sugar and 10 grams of starch. For context, a standard medium carrot weighs about 60 grams and has around 3 grams of sugar. So a half sweet potato is a bit richer than a single carrot, but not dramatically so for a healthy horse.

The practical limit most horse owners and equine nutritionists work with is one serving per day — and not every day. Treats are treats. A sweet potato is nutritionally denser than a carrot or an apple slice, so treating it like a daily staple isn’t the right approach. Think of it the way you’d think about giving your horse a more indulgent snack on occasion rather than as a feed supplement.

Cut sweet potato into chunks no larger than one inch before feeding. Horses don’t always chew as carefully as we’d like, and choking is a genuine risk with any firm, chunky treat. Smaller pieces are safer. This applies whether you’re feeding raw or cooked sweet potato.

I keep a kitchen scale — nothing fancy, a $12 Etekcity model from Amazon — near my feed area now because I got lazy about eyeballing portions and ended up giving Delia way more than I intended one afternoon. She was fine, but it was a good reminder that “half a sweet potato” looks very different depending on which sweet potato you grabbed.

Nutritional Benefits of Sweet Potatoes for Horses

Sweet potatoes earn their reputation as a nutritious food, and that holds up reasonably well when you look at what horses actually need.

The biggest nutritional story with sweet potatoes is beta-carotene. Sweet potatoes are exceptionally high in it — a 100-gram serving provides well over 100% of the human daily recommended intake, and horses convert beta-carotene to vitamin A in much the same way. Vitamin A supports vision, immune function, and reproductive health. Horses on good pasture usually get plenty, but stabled horses on hay-heavy diets can come up short.

• Beta-carotene — converts to vitamin A, supports immunity and eye health
• Vitamin C — horses produce their own, but additional dietary vitamin C from whole food sources doesn’t hurt
• Potassium — important for muscle function and hydration balance, especially in working horses
• Fiber — modest but present, contributes to digestive health
• Manganese — supports bone development and enzyme function

How does this compare to carrots, which are probably the most common horse treat? Carrots are lower in calories and starch, higher in water content, and similarly rich in beta-carotene. For a healthy horse, either is a fine occasional treat. Sweet potatoes are a bit more calorie-dense and starchier, so carrots win on simplicity for most horses. Sweet potatoes offer more variety and a slightly different micronutrient profile.

None of this replaces quality hay, balanced feed, and access to fresh water. A treat is a treat. Sweet potatoes aren’t a supplement — they’re a snack that happens to have some nutritional upside.

Which Horses Should Avoid Sweet Potatoes

This section matters a lot, and it’s where I want to be direct rather than vague.

If your horse has any of the following conditions, skip the sweet potato:

• Equine Metabolic Syndrome (EMS) — horses with EMS have impaired insulin regulation, and the sugar and starch in sweet potato can spike insulin inappropriately
• Cushing’s Disease (PPID) — Cushing’s horses are already at elevated laminitis risk; extra dietary sugar and starch adds to that load
• Insulin resistance — same concern as EMS; even a modest starch load from a treat can be problematic
• Horses on a weight management plan — sweet potatoes are calorie-dense for a treat; if your horse is already getting their diet trimmed down, this isn’t the treat to add
• History of laminitis — dietary sugar and starch management is central to laminitis prevention; sweet potatoes introduce unnecessary risk

I want to be clear that this isn’t about the sweet potato being a dangerous food — it’s a healthy food, and for most horses a small portion is completely fine. The issue is that metabolic horses have a very different relationship with carbohydrates than a healthy horse does. What’s a harmless occasional treat for Delia could genuinely trigger a painful episode in a horse who’s already managing insulin dysregulation.

If you’re not sure which category your horse falls into, ask your vet. That’s not a hedge — it’s just the right call when you’re managing a horse with any kind of metabolic history.

Raw vs Cooked — Does It Matter?

Both are safe. That’s the short answer.

Raw sweet potato is crunchy, which most horses enjoy. It’s easy to prep — wash it, cut it into small cubes, done. No cooking required. The texture is somewhere between a firm apple and a raw carrot, so horses that enjoy those treats usually take to raw sweet potato without hesitation.

Cooked sweet potato — baked, boiled, steamed — is softer and may be slightly easier to chew and digest, particularly for older horses or horses with dental issues. If you have a senior horse who struggles with harder foods, offering cooked sweet potato in small pieces is a reasonable choice.

What you absolutely cannot do is feed sweet potato that’s been prepared for human consumption. Butter, salt, brown sugar, marshmallows, cinnamon, any seasoning at all — none of that is appropriate for horses. Plain sweet potato only. If you baked a sweet potato for dinner and have leftovers, check what’s on it before sharing. A plain baked sweet potato with no toppings is fine. The loaded version from Thanksgiving is not.

Surprised by how often this needs to be said, but: no seasonings means no seasonings. Horses don’t need their food to taste like a holiday side dish.

One other note — sweet potato skin is fine. You don’t need to peel it. The skin is safe and horses generally aren’t bothered by it. Just wash the sweet potato thoroughly before cutting, the same way you would with any produce you handle.

Bottom line: sweet potatoes are a legitimate, safe treat for healthy horses when given in reasonable portions. Keep the serving to about half a medium sweet potato, cut it small, skip it entirely if your horse has metabolic concerns, and never confuse it with a regular potato. That last point alone is worth remembering every time you open the produce drawer.