Can Chickens Eat Onions?

When it comes to chickens, they are not picky and will eat just about anything you give them. However, there is some food that is healthy and some that are not. As for onions, can chickens eat them as well?

Can Chickens Eat Onions?

Yes, chickens can eat onions, but only in moderation. Many chicken keepers nowadays struggle with feeding them, such as what is safe or hazardous for hens to eat, what is nutritious and in what amounts, etc. Because most animals don’t consume onions, it’s safe to assume that chickens don’t either. The notion that chickens do not eat onions is untrue; thus, chickens can consume onions. However, the onions must be used sparingly and only on occasion.

Onions are a nutritious feed for chickens when consumed in moderation since they are high in minerals and vitamins. They are beneficial to the chicken’s bone and intestinal health. Onions can be hazardous to hens when consumed in excessive numbers, producing hemolytic anemia.

The edible onion components are the blossom, stem, and bulb of white, spring, or red onions. Many people are unaware that poultry can eat onions. In reality, all portions of the onion are acceptable for hens to consume, although feeding a small amount of onion to the chickens is good.

Is It Safe For Chickens To Eat Onions?

Yes, it is safe for chickens to eat onions. Onions are high in vitamins and minerals and are suitable for hens when eaten in moderation. Onions are beneficial to your hens’ intestines, bone health, blood sugar levels, and inflammation. Onions can be helpful to your hens. A small amount of onion is OK. Feeding too many onions can cause hemolytic anemia (also known as Heinz anemia).

Heinz body anemia is a blood disorder that causes hens to have weak legs, drowsiness, and an untidy appearance. However, this condition only develops if onions are fed to them excessively.

Is It Healthy For Chickens To Eat Onions?

Giving your chickens a reasonable quantity of onions can serve as an antioxidant, reduce blood sugar levels, and promote bone health.

Onions contain 89 percent water, 8% carbohydrates, and 2% fiber. The fiber has fructans, which are beneficial to gut health and provide excellent fuel to assist chickens in digesting their meal. Onions can improve your flock’s immune system and keep parasites at bay.

Nutrition Facts

In 3.5 ounces (100 grams) of raw onions are:

  • Calories: 40
  • Water: 89%
  • Protein: 1.1 grams
  • Carbs: 9.3 grams
  • Sugar: 4.2 grams
  • Fiber: 1.7 grams
  • Fat: 0.1 grams

Source: The USDA

Below are some health benefits of feeding onions to your chickens:

Keep Chickens Hydrated

Onions are a good source of water, making up about 89% of water. This means onions can help keep the chickens hydrated, especially during the summer.

Loaded With Antioxidants

Onions are high in antioxidants, which the chickens can benefit greatly from. An antioxidant is a compound that helps protect the cells in the body from damages caused by free radicals.

If there are too many free radicals in the body, it can lead to illness and disease.

Help Boost Digestive Health

Onions are rich in fiber and prebiotics, which is essential for a healthy digestive system.

Prebiotics are a type of fiber that cannot be digested. Since it cannot be absorbed by the body, it will be broken down by beneficial gut bacteria.

The gut bacteria feed on prebiotics and create short-chain fatty acids. The fatty acids help strengthen gut health, boost immunity, and enhance digestion.

Also, fiber will help bulk up the stool, which will help it move smoothly through the digestive tract.

Can Baby Chickens Eat Onions?

You should avoid feeding onions to your baby chickens. Chicks are more sensitive than mature ones regarding their health. Onions contain some toxic chemical compounds which can cause serious health issues.

However, once the chicks are around 3 weeks old, you can introduce onions to them. After it’s roasted or boiled, cut them into tiny pieces and toss them to the chicks.

How To Feed Onions To Chickens?

 Here’s how to safely add onions to your chicken’s diet:

 Cooked onions: Cook the onions in a small amount of water until they are tender. Allow them to cool before chopping them into tiny pieces and incorporating them into feed or other goodies.

Roasted onions on a string: This delightful and healthy snack will keep your hens entertained. Roast the onions in the oven or on the grill until tender but not mushy. Thread a line through the onion and hang it in the coop. The girls will have a good time while also boosting their heart health.

Raw onions:  If you have extra onions or onions that are about to go wrong (never give moldy onions to your chickens), cut them into tiny pieces and drop them into the coop or mix them into their meal. Keeping the onion to approximately a tablespoon per bird is plenty to allow them to benefit from the beneficial qualities of onions without causing stomach discomfort.

How Many Onions To Feed Chickens?

Unfortunately, there is no limit to the number of onions you may give your birds. You may feed your chickens by cutting an onion into tiny pieces. Keep in mind that too many onions might be detrimental to your chickens. You may provide your hens by cutting an onion into small pieces. You may do this in the kitchen while cooking veggies.

Alternatively, if you have any leftover onions, you may use those. Aside from that, you may give your hens sautéed onions.

You may incorporate a few grilled onions into your daily diet. It is prudent to restrict the number of onions fed to adult chickens. You should also not push them to eat onions or any other goodie if they do not enjoy it.

How Often Can Chickens Eat Onions?

Feeding onions to chickens twice a week should be enough for them to enjoy. Onion contains some toxic chemical compounds which are not favorable for chickens. Providing onions to chickens in moderation is the best option to control their diet.

Other Vegetables That Chickens Can Eat


Radishes are a good source of vitamin C, calcium, and magnesium. All of these nutrients are essential for the overall health of the chickens. While you can feed them raw radishes, the chickens may not eat them, though. Instead, you can cook them first to remove some bitterness before feeding them to your chickens.

Also, radish greens can be fed to the chickens. It contains plenty of vitamins and minerals.


Lettuce comes in different varieties and is all safe for chickens to eat. However, you will want to avoid iceberg lettuce since it has very little nutritional value and is high in water content. The best variety of lettuce to feed them is Romaine lettuce. 


Jicama is rich in antioxidants, vitamins, minerals, and plenty of other nutrition. It makes a great snack for chickens since it’s dense in nutrients and low in calories.

However, you want to avoid the skins and leaves of the jicama plant. These parts contain a toxin called rotenone which is harmful to the chickens.

Therefore, only feed them the root of the plant. Be sure to peel away all the skin first before giving your chickens.


Onions are safe to feed your chickens, but only in moderation. This vegetable is rich in fiber, proteins, vitamins, and minerals. To get them to eat the onions, roast or boil them first.