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Related Experiment Videos

The behavior of sick animals.

B L Hart1

  • 1Behavior Service, Veterinary Medical Teaching Hospital, University of California, School of Veterinary Medicine, Davis.

The Veterinary Clinics of North America. Small Animal Practice
|March 1, 1991
PubMed
Summary

Sick pets often appear depressed and anorexic due to febrile diseases. This behavior, observed in wild ancestors, is an adaptive response to conserve energy for fighting infection and fever.

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Area of Science:

  • Veterinary Medicine
  • Animal Behavior
  • Infectious Diseases

Background:

  • Febrile diseases in domestic dogs and cats commonly manifest as depression and anorexia.
  • These behavioral changes in ill animals are often interpreted as simple debilitation.

Purpose of the Study:

  • To re-evaluate the adaptive significance of behavioral changes in sick animals.
  • To understand the evolutionary basis of sickness behavior in domestic animals.

Main Methods:

  • Comparative analysis of sickness behavior in domestic animals and their wild ancestors.
  • Behavioral observation and interpretation within the context of evolutionary biology.

Main Results:

  • Sickness behaviors, such as depression and anorexia, are not solely indicators of debilitation.
  • These behaviors are adaptive, allowing wild animals to prioritize energy for fever response and pathogen combat during acute infectious diseases.

Conclusions:

  • The observed behaviors in ill domestic animals likely stem from adaptive responses evolved in their wild ancestors.
  • Understanding sickness behavior as an adaptive strategy can inform veterinary care and disease management.

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