Can Chickens Eat Mice? The Pros and Cons

A Mice With Brown Hair (image by Alexas_Fotos, Pixabay)

Article Summary

  • Chickens are omnivores and can eat mice, providing extra protein, fat, vitamins, and minerals in their diet.
  • While there are benefits to feeding mice to chickens, there are also potential risks, including the spread of diseases, internal parasites, pesticide poisoning, injuries, and choking hazards.
  • The type of mice recommended for chickens includes domestic feeder mice raised in controlled conditions and properly prepared options like frozen mice.

Chickens are omnivores, meaning they can eat both plant and animal matter. While chickens are more commonly fed grains, vegetables, and bugs, they are also opportunistic eaters and will consume small animals like mice if given the chance. Eating mice can be beneficial for chickens by providing extra protein. However, there are also some potential risks to be aware of. Here’s a closer look at whether chickens can and should eat mice.

Do Chickens Eat Rats and Mice?

Yes, chickens will eat mice and rats if they can catch them. In the wild or free-range settings, chickens will hunt and consume small rodents as a natural part of their diet. The movement of mice and rats triggers the chicken’s predatory instincts. Chickens are surprisingly savvy hunters and will scratch, peck, and claw at mice until they are able to grab and subdue them. They will then swallow the mice whole.

Is It Safe for Chickens to Eat Mice?

Eating mice can be safe for chickens but there are some potential risks to consider. On the plus side, mice provide extra protein, fat, vitamins, and minerals in a chicken’s diet. This supplemental nutrition can lead to better egg production and overall flock health.

…mice may also carry parasites, diseases, or pesticides that can sicken chickens.

However, mice may also carry parasites, diseases, or pesticides that can sicken chickens. Salmonella, tapeworms, toxoplasmosis, and Lyme disease are examples of risks associated with consuming mice. It’s best to limit how many wild mice chickens eat and monitor your flock closely. Cooked mice are safer.

Can Chickens Swallow Mice Whole?

Yes, chickens are able to swallow mice whole. Their digestive system is designed to break down and dissolve bones, fur, and meat. Chickens do not have teeth so they rely on their muscular gizzard to grind up food after swallowing.

Chickens may spend time tossing, pecking, and carrying a mouse around before finally tilting their head back to swallow the mouse down. Very large mice may need to be torn into pieces first. But most adult mice and small baby mice can be gulped down with no problem by a hungry chicken.

Are There Any Risks Feeding Mice to Chickens?

Feeding mice to backyard chickens does carry some inherent risks, including:

  • Spread of diseases: Mice may carry harmful bacteria like salmonella or viruses that can spread to chickens. This is especially true of wild mice.
  • Internal parasites: Mice can transmit worm parasites that impact gut health internally to chickens.
  • Pesticide poisoning: Eating mice with ingested pesticide baits or treated fields can poison chickens.
  • Injuries: Attempting to catch and subdue mice can lead to pecking wounds or scratches on chickens.
  • Choking hazards: Chickens gulping mice too quickly or swallowing large parts could potentially choke.

Overall, these risks can be managed by sourcing clean mice, limiting quantities, and monitoring chicken health. But it’s wise to be aware of the potential downsides.

Can Chickens Get Sick from Mice?

Yes, chickens can get sick from eating mice, especially wild mice. Some of the common illnesses chickens can contract from mice include:

  • Salmonella – A bacterial infection that causes diarrhea, fever, and lethargy. It can spread rapidly among flocks.
  • Campylobacter – Another pathogenic bacteria that leads to digestive issues and reduced egg production.
  • Lyme Disease – Caused by borrelia bacteria in mice. It can cause chickens to become lame and weak.
  • Tapeworms – Intestinal worms transmitted by mice via ingestion of larvae. Results in weight loss and poor nutrition absorption.
  • Toxoplasmosis – A parasitic disease that impacts respiratory health. Mice serve as an intermediate host.
Wild Mice on Grass (image by btfrewinphotography, Pixabay)

The risk depends on the mouse’s health and sanitation. Wild mice pose more hazards than commercially raised feeder mice. Still, just like other animals offered to chickens, any mouse should be fed in moderation.

What Type of Mice Can Chickens Eat?

Chickens can eat various types of mice but some varieties are safer and more appropriate:

  • Domestic feeder mice – Commissary-raised mice bred as reptiles or bird food are the safest option. They are grown under controlled conditions with proper nutrition and health management. Feeder mice are unlikely to introduce new pathogens or parasites.
  • Wild mice – Eating wild mice is riskier but generally okay in moderation. Field mice have a more varied diet and greater disease exposure. Avoid wild mice with questionable health.
  • Baby mice – Called pinkies, fuzzies, or crawlers. Small, soft pink mice are the easiest for chickens to eat. Larger adults may need to be chewed.
  • Frozen mice – Thawing frozen feeder mice before feeding is safer as the freezing process kills lingering bacteria and parasites.


Avoid any wild mice potentially exposed to rodenticides or environmental toxins. Overall, commercially raised pinkies and domestic feeders are the best mice for chickens to consume.

How Much Mice Can Chickens Eat?

Chickens can safely eat 1-2 mice per week, comprising up to 10% of their overall diet. They have high protein needs, especially during molting and egg production. One adult mouse can provide a chicken with over 5 grams of protein.

However, more than 2 mice per chicken weekly risks too much fat and biotin, which can impact egg-laying. Too many mice can also increase the odds of chickens contracting a rodent-related illness. Moderation is key.

The amount may be adjusted based on the chicken’s size, age, and energy needs. Larger heritage breeds can handle more mice than bantam chickens. Growing young chickens need ample protein. Always monitor your flock’s condition when feeding mice.

How to Feed Mice to Chickens?

Here are some tips for safely feeding mice to chickens:

  • Source high-quality frozen feeder mice from reputable suppliers when possible. Avoid wild mice of unknown origin.
  • Thaw frozen pinkies, fuzzies, and adult mice completely before feeding. Do not leave decaying mice in the pen.
  • Place mice in a fly-proof dish or feeder. Spreading them in the run encourages foraging.
  • Introduce mice gradually to observe any adverse reactions. Start with portions of 1 pinky per large chicken.
  • Provide a calcium supplement like oyster shell to balance the high phosphorus in mice.
  • Remove any uneaten portions within 1-2 hours. Don’t allow mice to linger and rot.
  • Monitor chickens closely for signs of illness after introducing new feed. Isolate any showing concerning symptoms.

Follow biosecure practices when sourcing, handling, and feeding mice to chickens. Take care to do it safely.

How Often to Feed Mice to Chickens?

Chickens should not be fed mice too frequently. Once or twice a week is ideal in most cases. Here are some general mouse-feeding guidelines per chicken:

  • Laying hens – 1-2 mice per week
  • Broody hens – 2-3 mice per week
  • Growing chicks – 2-4 mice per week
  • Roosters – 1-2 mice per 1-2 weeks

Increase mouse meals during high protein demand times like winter, molting, and chick rearing. Reduce when adequate protein is otherwise met through high-quality feed.

Avoid feeding mice daily or in excess, as too much rich nutrition can cause digestive upset. Monitor egg quality and chicken health closely when introducing mice. Adjust amounts as needed for optimal flock health and performance.

Free-Ranging Chickens

Can Baby Chickens Eat Mice?

Yes, baby chickens can eat mice but the mice should be properly prepared and sized. Chickens under 6 months old have some special considerations:

  • Softer, partially grown pinky or fuzzy mice are the easiest for chicks to digest safely.
  • Chop larger mice into bite-sized pieces for young chickens. Avoid whole adult mice.
  • Mix a small portion of mashed mice into chick starter feed. Don’t overwhelm their digestive systems.
  • Feed mice to chicks 2-3 times per week at most for a protein boost.
  • Take care of introducing new proteins gradually to observe reactions.
  • Ensure adequate space for all chicks to eat. Avoid competition and bullying.

While mice can provide a good protein increase for fast-growing chicks, feed them conservatively in proper ratios to avoid overconsumption by some chicks. Pay close attention to any signs of illness.

Frequently Asked Questions

Can chickens get sick from mice?

Chickens can potentially get sick from mice as rodents may carry diseases that can be transmitted to chickens. Diseases such as Salmonella and Avian Pathogenic Escherichia coli (APEC) can be contracted by chickens through contact with contaminated areas or food sources. Proper pest control measures are essential to minimize the risk of illness in poultry.

Will chickens eat dead mice?

Chickens are opportunistic omnivores and may eat dead mice if they come across them. However, it’s not recommended to intentionally feed dead mice to chickens. Feeding a well-balanced poultry diet is essential for their health, and relying on proper feed ensures they receive the necessary nutrients in the correct proportions.

Do chickens eat mice whole?

Chickens may eat mice whole, as they are known to consume small animals as part of their natural diet. However, it’s essential to consider the size of the mouse in relation to the chicken’s beak and digestive capabilities. Larger mice may be pecked apart before consumption, while smaller ones could be ingested whole. It’s crucial to provide a balanced diet to chickens to meet their nutritional needs rather than relying on mice as a primary food source.