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Related Experiment Videos

Crop impaction resulting from feather ball formation in caged layers.

T Y Morishita1, P P Aye, B S Harr

  • 1Department of Veterinary Preventive Medicine, Ohio State University, Columbus 43210, USA.

Avian Diseases
|April 27, 1999
PubMed
Summary

Unfamiliar environments can trigger abnormal behaviors like pica in poultry. This can lead to crop impactions from feather ball formation in specific-pathogen-free chickens.

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Area of Science:

  • Avian health and behavior
  • Poultry science
  • Veterinary pathology

Background:

  • Abnormal behaviors such as feather pulling and pica are documented in commercial poultry when introduced to unfamiliar environments.
  • Specific-pathogen-free (SPF) chickens are often used in research and require careful management during introduction to new settings.

Observation:

  • Twelve SPF chickens were housed in unfamiliar farm environments for three weeks.
  • Physical examination revealed thin birds, with one in each group exhibiting a palpable mass.
  • Necropsy confirmed masses in the crop, identified as feather and feed debris.

Findings:

  • Sudden placement in unfamiliar surroundings induced pica in SPF chickens.
  • Feather ball formation within the crop led to impactions.

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  • The observed pica and subsequent impactions were directly linked to environmental stress.

    • Implications:

    • Avian researchers and veterinarians must consider prior environmental conditions before introducing new birds, especially SPF populations.
    • Sudden environmental changes can precipitate stress-related behaviors like pica, impacting bird health.
    • Understanding environmental stressors is crucial for preventing crop impactions and other abnormal behaviors in poultry.