Even wild rodents naturally enjoy running on wheels. When wheels were placed in nature, free living wild mice were observed to spontaneously run on them. This is a 6 week old baby Roof Rat encountering a wheel for the first time.

Even wild rodents naturally enjoy running on wheels. When wheels were placed in nature, free living wild mice were observed to spontaneously run on them. This is a 6 week old baby Roof Rat encountering a wheel for the first time.