Mice do not necessarily fully use large, barren cages ... T.H. Operant studies to determine the strength of preference in laboratory rats for nest-boxes and nesting material.
A laboratory rat or lab rat is a brown rat of the subspecies Rattus norvegicus domestica which is bred and kept for scientific research. While less commonly used for research than mice, rats have ...
When they arrived at our local animal facility, the males were about 1 month old and were housed in groups of five individuals in large plexiglass cages with free access to laboratory rat pelleted ...