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Pecking To Death

Cannibalism and feather pecking are a common behavioral problem in poultry worldwide. Incidents increase in overcrowded conditions, nutrient deficiencies, feed type, presence of excessive light intensity or variations, hot temperatures, stressful conditions, sheer boredom, and diseases causing lameness and inactivity. If a chicken is injured and there are bloodstains, broken skin, raw wounds and/or injured vent, it increases the occurrence of cannibalism in birds.

There are a number of different causes for increased incidents of feather pecking in birds, including:
  • Housing Conditions: Overcrowded living conditions, excessive light, and not providing enough nest boxes or roosting space for flock members can result in feather pecking.
  • Environmental Stresses: Birds exposed to high temperatures and occurrence of abrupt weather changes can stress birds, leading to aggressive behavior.
  • Diet: When birds receive inadequate amounts of protein, phosphorus, and sodium in their diet, an excessive high-energy and low-fiber diet, or lack of fresh greens, they can develop aggressive behavior.
  • Management-related: Since chickens tend to instinctively prey on the sick and injured, any injured birds should be relocated to a separate area, away from other birds until fully recovered. Flock size should include more than or less than 30 birds. When flocks have 30 birds, they tend to have more problems within their social hierarchy. Feather pecking can also occur more often in flocks which combine birds of different ages, breeds, colors, or sizes that have not grown up together.

Clinical Signs

Loss of feathers
Pecking at one another
Skin trauma


  • History
  • Clinical signs
  • Physical exam


Environmental enrichment: There are a wide variety of different ways to improve the environment of flocks, many free or at minimal expense. Some of these include addition of different perches to roost, straw bales, plastic water bottles, hanging vegetables, additional dusting areas, nesting boxes, etc.



  • Ensure that your not overcrowding chickens and that there is enough room provided so that chickens can run away and hide if they need to from another bird bullying them
  • Provide plenty of < a href="">environmental enrichment options to alleviate boredom (which is what often leads to peaking)
  • Incorporate in hide spots
  • Take time to watch how chickens get along with one another on a daily basis.
  • Install a coop camera to monitor how flock members get along without you being there.
  • If a bird is injured and bleeding, DO NOT put them back inside the enclosure with the other birds. Instead, relocate them to your chicken first aid area for them to recover. Chickens are attracted to the color red, and will often purposely be driven to peck at any bird that's bleeding.

Scientific References

Good Overviews

Risk Factors

  • Overcrowded conditions
  • Not providing enough enrichment items to enhance the environment (aka pecking objects, forages to browse, dust bathing areas, perches for roosting, etc.)
  • Letting a injured, actively bleeding bird remain in the enclosure with the other birds, instead of relocating them to an alternative location to recover.
  • Not gradually introducing new flock members to the group over a month to 2 month time period.