Acclimation of Animals

The “Guide for the Care and Use of Laboratory Animals, 8th Edition”, states: “…newly received animals should be given a period for physiologic, psychological, and nutritional acclimation before their use.” Transportation and ‘new surroundings’ have been documented to affect normal physiology and function of animals. Acclimation is an important component of animal welfare, animal well-being, and stable research outcomes. 


  • All newly received animals require a minimum of 48 hours to acclimate before experimental use. 
  • Exceptions to the 48-hour acclimation period will require an approved written justification included in the protocol. 
  • The 48-hour acclimation period will not be required for animals not used for data collection.
Policy Adoption Date: 11/12/2013

Reference Minutes: 11/12/2013