Your hens can have sweet potato. Cook it first and keep the serving small. A laying hen’s whole treat share for a day comes to about half to three quarters of a tablespoon of mash, so one medium baked sweet potato covers 8 to 11 hens.
I rewrote this page from 20 sources, and they’re all listed at the bottom. The feeding rules come from Colorado State and Alabama Extension, plus UC Davis and the Merck Veterinary Manual. The sweet potato facts come from FAO and from Feedipedia, the feed database that French agricultural research bodies run with FAO. The nutrient numbers are the USDA’s own, from FoodData Central. I’ll name the rest as they come up.
This page used to open with somebody “drinking a cold one” in the backyard while a hen named Matilda scarfed down a sweet potato half from the night before. Then came “No way, I thought to myself”. It talked about “my girls” and “my ladies”. Those birds “turned their beaks up at carrots, zucchini”, it said, and they were picky eaters “lot like myself”. The writer shared “tips and tricks I’ve learned” and liked “to offer mine a mix of raw and cooked”. There was a line about being “an avid poultry enthusiast” too, plus a half-remembered claim that the Inca bred chickens for that orange color. It signed off to “whip up a batch of baked sweet taters” for dinner. I can’t vouch for any of it, so it’s all gone.
The old advice went too. It promised a hen “over 200% of their daily vitamin A needs” from one medium baked sweet potato, and it called the stuff “chicken crack”. It said vitamin A “skyrockets in availability when cooked” while raw keeps its vitamin C. It claimed sweet potatoes “change the color of chicken meat and eggs”. It told you to wait until chicks are 4 months old, and it called roosters “more assertive eaters”. It also gave storage times from 5 days to a year, plus a list of signs that a hen had eaten too much. I couldn’t back up any of that. A few of those claims get a section below, because the real numbers are more fun.
A word on the photos. None of them shows a hen eating sweet potato, because I couldn’t find a real one I’d trust. The two field shots come from the USDA’s own photo stream, taken on September 20, 2013, during the sweet potato harvest at Kirby Farms in Mechanicsville, Virginia. The sliced sweet potatoes and the chicks come from Alabama Extension’s photo stream. The baking slices there are seasoned for people, so picture a hen’s share plain. The other three photos are from Unsplash, and every credit links to the photo’s own page.
The short version.
- Cook it. Raw sweet potato carries trypsin inhibitors that cut into protein digestion, and cooking knocks most of that down.
- A hen’s share is 10 to 15 grams a day for every treat combined. That’s about half to three quarters of a tablespoon of plain mash.
- Moldy or rotten ones go in the trash. Keep raw ones out of the fridge, where the cold sets them up to rot.
- Chicks get starter only for their first two weeks. If a hen acts off after eating something, call a vet who sees poultry. We aren’t vets.
Yes, but Cook It First
FAO has a small table that makes the case better than I can. It lists how strongly each feed inhibits trypsin, which is a digestive enzyme. Raw soybean comes in at 89.5%. Raw sweet potato isn’t far behind at 78.8%. Cooked sweet potato drops to 16.7%.
That matters for your hens. Feedipedia says the trypsin inhibitors in raw tubers are “still sufficient to decrease protein digestibility in diets”.
FAO’s write-up says cooking is necessary for two reasons, “starch digestibility and the presence of trypsin inhibitors”. Feedipedia agrees that cooking “reduces trypsin inhibitors and improves starch digestibility”.
You don’t need a thermometer for this. Feedipedia says “Moist heat treatment at temperatures above 80°C is effective in eliminating trypsin inhibitor activity”. That’s 176°F, and boiling water runs at 212°F. A sweet potato boiled or steamed soft for your own supper is cooked enough for the run.
Serve it plain, though. Colorado State Extension says to make sure scraps “are not salty”, and UC Davis says to “avoid fatty foods”. So the buttered holiday leftovers stay on your plate.
Our Can Chickens Eat It? checker agrees. Type in sweet potato and it says “Fine as a treat”, since it’s a vegetable scrap “of the kind Colorado State Extension suggests for treats”. Wondering about the peels? I went through those on their own page about sweet potato skins, and the rules are the same: cooked and clean.
Half a Tablespoon of Mash Is a Hen’s Whole Share
Here’s the math I use on every food page. Colorado State Extension says “Treats should make up no more than 10% of their daily diet.” Alabama Extension says “A laying hen will consume between 100 and 150 grams of feed per day or roughly 0.25 pounds.” Ten percent of that is 10 to 15 grams a day. That counts every treat she gets, not just the sweet potato.
Now the sweet potato. FoodData Central weighs a cup of boiled, mashed sweet potato at 328 grams. A cup is 16 tablespoons, so a tablespoon of mash is about 20.5 grams. That puts a hen’s share at about half to three quarters of a tablespoon.
The same database puts the flesh of a medium baked sweet potato, 2 inches across and 5 inches long, at 114 grams. That’s enough for 8 to 11 hens.
That’s it. That’s the serving.
Now look at what the old page said. In one spot it called “1/4 to 1/2 potato per chicken” plenty. For a medium one, that’s 28.5 to 57 grams per hen, or about two to nearly six days of treats at once (my math). A few lines later it said “1/4 to 1/2 of a medium sweet potato” split between 2 and 5 hens. That works out to 5.7 to 28.5 grams each. So the page held two rules, and its biggest serving was ten times its smallest.
Colorado State adds one more rule I like. Put out only what the flock can clean up in 5 to 10 minutes, so you don’t draw in nuisance animals. UC Davis sums it up: “treat the scraps like a treat not like the main course”.
Our checker shows the same 10 to 15 grams a hen, and it’s the share that runs through every food page here, coconut included.
That Vitamin A Line Was a People Number
The old page said one medium baked sweet potato gives a hen “over 200% of their daily vitamin A needs”. That’s the language of a Daily Value, the number on a human food label. The FDA says DVs “are the recommended amounts of nutrients to consume or not to exceed each day”. Its DV for vitamin A is 900 micrograms RAE, and that’s for people.
FoodData Central lists 961 micrograms RAE per 100 grams of baked sweet potato. So a 114-gram medium one holds about 1,096 micrograms. That’s about 122% of a person’s DV (my math). It isn’t 200%, and it isn’t a hen’s number at all.
A hen needs far less than you’d think. Merck’s table for Leghorn-type layers asks for 3,000 IU of vitamin A per kilogram of feed. The table assumes a hen eats 110 grams of feed a day, so that’s 330 IU a day (my math). Merck also gives the conversion. For chickens, 1 IU of vitamin A equals “0.6 mcg of beta-carotene”.
Baked sweet potato holds 11,509 micrograms of beta-carotene per 100 grams. Ten grams, the bottom of a hen’s treat share, holds about 1,151. Divide by 0.6 and you get about 1,918 IU, or close to six times her day’s need (my math).
Her feed already has that covered, though.
Alabama says complete feeds are “designed to be the sole source of nutrients”. Merck says birds “should receive most of their diet from a balanced, nutritionally complete ration”. Her vitamin A is already in the layer feed. Sweet potato is a treat she likes, not a supplement she’s missing.
The other vitamin claims don’t hold up either. Merck says “Vitamin C can be synthesized by poultry at adequate amounts in normal conditions”, though extra may help in very hot weather. The claim that raw keeps its vitamin C runs backward in the USDA’s own entries, which list 2.4 milligrams per 100 grams raw and 19.6 baked. And “skyrockets”? The same entries go from 709 micrograms RAE raw to 961 baked. That’s about a third more. It’s a bump.
Will It Turn the Yolks Orange? Not at Treat Size
The best trial I found ran in Ethiopia. Kebe and two colleagues at Haramaya University fed 96 White Leghorn layers for 90 days. They swapped part of the maize in the feed for meal made from orange-fleshed sweet potato roots, at four levels, from none up to 15% of the diet. On the Roche color scale, the yolks went from 2.06 with none to 4.22 at 15%. At 5%, the yolks didn’t differ from the control in the stats.
Now scale that to a backyard hen. The hens on 5% ate about 101 grams of feed a day, so they got about 5 grams of dried root meal. That meal was about 93% dry matter. Baked sweet potato is about 24% dry matter, since FoodData Central puts its water at 75.78 grams per 100. So 5 grams of meal matches roughly 19 grams of baked sweet potato (my math).
That’s more than a hen’s whole treat share, every day for three months, and the yolks still didn’t change enough to count.
The 15% hens ate about 108 grams of feed, so about 16 grams of meal. That’s roughly 62 grams of baked sweet potato a day (my math), or four to six times a hen’s treat share.
A Thai study points the same way. Sonthaya Moonsrikaew and colleagues fed 150 Lohmann Brown hens discarded sweet potato tubers in place of half to all of the corn. They called the yolk color “similar as corn”. That’s a swap for the main grain, not a treat on the side. I read that one as its abstract.
There’s a real seed of truth in the old color claim, but it sits in the vines. FAO says “The xantophyll of sweet potato vines is a good pigmentation agent for egg yolks and broiler skins.” That’s for vines dried and fed as part of the ration, which is the next section but one.
Keep Raw Ones Out of the Fridge, and Moldy Ones Out of the Run
This one surprised me. Raw sweet potatoes don’t like the fridge. UC Davis’s postharvest center says they “should be stored between 12.5°C and 15°C (55°F to 59°F)”. It calls them “very sensitive to chilling injury at temperatures of 12.5°C (55°F) or below”, and the first symptom it lists is fungal decay. A home fridge runs at “40°F (4°C) or below”, per FoodSafety.gov. So a raw one in the fridge is set up to rot.
Farms cure them warm. The USDA’s caption on one of these photos says the hand-picked roots at Kirby Farms go to a heated warehouse to cure, “a process that toughens the skin”. UC Davis adds that “Chilling and mechanical injury predispose sweet potatoes to decay”. A cracked or bruised one won’t keep as long either.
Rot can move fast. A University of Hawaii fact sheet on Java black rot says infected roots of Okinawan sweet potato may be completely decayed 3 to 5 weeks after harvest.
Mold is the hard line. Type moldy sweet potato into the checker and it says “Never”. Colorado State says scraps should not be moldy, and UC Davis says not to feed rotten food. Feedipedia warns that “Mouldy tubers can be toxic, resulting in lung oedema in laboratory animals and cattle”. The Merck Veterinary Manual covers the cattle case. A sweet potato infested with the fungus Fusarium solani makes a toxin in response, and the end product is a lung poison called 4-ipomeanol. Those reports are on cattle and lab animals, not hens. That’s no reason to find out with a hen.
The old page gave storage times, from 5 days for cooked leftovers to a year dried. I couldn’t find a source for those, and the FoodSafety.gov chart has no line for cooked sweet potato. So I won’t give you a day count. If a leftover smells off or shows fuzz, it goes in the trash, not the run. Our page on what not to feed chickens has more on moldy scraps.
Your Store’s “Yam” Is Almost Surely a Sweet Potato
If the bin at your store says yam, it’s probably a sweet potato anyway. The Library of Congress says the soft varieties got the yam label in the US, and that the USDA now requires a yam label to say sweet potato too. Its bottom line: “Unless you specifically search for yams, which are usually found in an international market, you are probably eating sweet potatoes!”
A true yam is a different plant. The Library of Congress says yams are monocots from their own family, while sweet potatoes come from the morning glory family. Illinois Extension says a true yam is “covered in a tough, scaly skin that is difficult to remove”, while a sweet potato’s skin is smooth and thin. If you picked up a real yam at an international market, this page doesn’t cover it. Feedipedia’s yam pages are marked as under construction, with a note not to quote them, so I won’t.
Our checker reads yam as sweet potato, which matches what’s in most US bins.
And a sweet potato isn’t a potato. NC State Extension says it’s “only distantly related to potato (Solanum tuberosum)”. That matters, because potatoes come with their own rules. UC Davis says to avoid “green areas of potatoes”, and our checker rates potato “Only prepared the right way”.
The Vines Are Feed Too, Dried
If you grow sweet potatoes, you’ll have a pile of vines at harvest. Feedipedia says “Dried sweet potato vines can be used in poultry rations as a source of protein and carotenoids, particularly beta-caroten and xanthophylls.” It also says “Early-harvested vines were as efficient as alfalfa meal at colouring yolks.”
Feedipedia gives limits, too. For meat birds, a study it cites suggested about 10% dried leaves as the best level, since more cut into feed intake and weight gain. Fresh leaves did worse. In a 1950 trial it cites, chickens on fresh sweet potato leaves came out the smallest and died the most, next to chickens on fresh centro or leucaena leaves.
The vines carry trypsin inhibitors too, but Feedipedia calls the levels “relatively harmless”. FAO’s table puts fresh vines at 26.1% and vine meal at 16.7%, far below raw roots.
Two practical things. Fresh leaves count against the same 10 to 15 gram treat share. And don’t let a pile sit, because Feedipedia says cut vines “decay in 2 or 3 days”.
Chicks Get Starter First
The old page said to wait until chicks are 4 months old. I couldn’t find that anywhere. Cackle Hatchery’s rule is shorter: “Feed only starter ration for at least the first two weeks”. After that, treats can start in small amounts. Cackle says not to feed treats “amounting to more than 10% of the chicks’ diet by volume”.
Chop everything small enough to prevent choking. Once chicks start eating anything fibrous, Cackle says they need grit.
Cooked matters even more for chicks. Feedipedia says raw sweet potato starch was only 74% digestible in young birds, and that it got better with age. Merck adds that “young chicks use beta-carotene less efficiently than older birds”.
So after two weeks, a little cooked mash is fine, and small is the word. Our page on baby chicks and mealworms works through the same 10% rule for the brooder.
Sources
- P. L. Dominguez, FAO: Feeding of sweet potato to monogastrics (in an FAO book on roots and tubers as animal feed).
- Feedipedia: Sweet potato (Ipomoea batatas) tubers.
- Feedipedia: Sweet potato (Ipomoea batatas) forage.
- USDA FoodData Central: sweet potato, cooked, baked in skin, flesh (SR Legacy 168483) and sweet potato, raw (168482). The cup of mash is sweet potato, boiled without skin (168484).
- U.S. Food and Drug Administration: Daily Value on the Nutrition and Supplement Facts Labels.
- Doug Korver, Merck Veterinary Manual: Nutritional Requirements of Poultry.
- Yuko Sato, Merck Veterinary Manual: Management of Backyard Poultry.
- John Campbell, Merck Veterinary Manual: 4-Ipomeanol Toxicosis (Moldy Sweet Potato) in Cattle.
- Colorado State University Extension: Raising Poultry the Organic Way.
- Wilmer Pacheco and colleagues, Alabama Cooperative Extension System: Feeding the Laying Hen.
- Maurice Pitesky and Nancy Reimers, UC Davis: Feeding your Flock (PDF).
- Cackle Hatchery: What to Feed Baby Chicks.
- Kebe and colleagues: replacing maize with orange flesh sweet potato root in White Leghorn hens (Livestock Research for Rural Development 35(10), 2023).
- Sonthaya Moonsrikaew and colleagues: discarded sweet potato tubers in laying hen feed (RMUTSB Academic Journal, 2022, read as its abstract).
- Marita Cantwell and Trevor Suslow, UC Davis Postharvest Research and Extension Center: Sweet Potato.
- FoodSafety.gov: Cold Food Storage Chart.
- Scot Nelson, University of Hawaii CTAHR: Java Black Rot of Okinawan Sweetpotato (PD-55, 2008).
- Library of Congress: What is the difference between sweet potatoes and yams?
- Illinois Extension, Good Growing: What’s the Difference Between Sweet Potatoes and Yams? (2019).
- NC State Extension Gardener Plant Toolbox: Ipomoea batatas.
- Chicken Rise: Can Chickens Eat It? checker, our own tool, checked for sweet potato and yam, then for moldy sweet potato and potato.
Sources checked October 29, 2026. UC Davis’s sweet potato page turned my reader away that day, so I read it through the Internet Archive. Same for the Library of Congress page and the FoodSafety.gov chart. I read the Thai study as its abstract, not the full paper. The per-hen math is mine, from these sources, and so are the vitamin and yolk sums. If a hen acts off after eating something, call a vet who sees poultry. We aren’t vets.
Related read: How to Raise Chickens for Eggs — Instant PDF download. Secure checkout by Stripe
