Hamsters are among the most commonly kept small pets but are frequently housed in inadequate conditions that deny their natural behaviors, leading to chronic welfare problems.
Hamster welfare in captivity suffers from a significant mismatch between their natural needs and typical pet keeping conditions. Wild hamsters are solitary, territorial animals that travel enormous distances nightly. Standard commercial hamster cages provide inadequate space for normal movement. Bars or wheels that are too small cause spinal injury. Hamsters forced to be active during the day for human interaction experience disrupted circadian rhythms and stress. The minimum recommended wheel diameter is 28cm for Syrian hamsters to prevent back arching. Burrowing substrate must be at minimum 30cm deep to allow natural digging behavior. Same-species housing of Syrian hamsters causes fighting and stress. Welfare-conscious keeping requires a minimum of 100cm x 50cm floor area.