This information can be used to inform patients and their health care professionals as they decide the best course of treatment and to improve care for patients in the future. Information from registries may also be used to compare the performance of healthcare providers with regard to their outcomes and resource use.
Quick Answer. A house mouse that is a pet has an average life span of about two years. There have been mutant and calorie-restricted mice in captivity that have lived for up to five years.
The average life span of a rat is 2 years to 5 years. The absolute minimum is 1 year and some people say rats live from 1 to 1.5 years old, but that isn't true. They live up to 5 years depending on how well you take care of them and if they were born with a disease or got one. Rat Owner/ Rat Breeder.