Discussing analgesia in rabbits and rodents, Olivia A. Petritz, DVM, DACZM, provides an overview of recent studies. She also refers to the development of grimace scales for rabbits, rats and mice.
Source: Veterinary Practice News, September 20, 2024. Link.
Clinical signs of pain in rodents are similar to rabbits and include a hunched posture, lack of or increased grooming, and decreased activity levels.”