All of us in our lives have encountered rats and mice at some point, whether it’s been in the garden, at a pet shop or in a field. Those of us unfortunate enough to have experienced them in their home or business will know all too well the risks they pose and the long-term damage that can occur.
They both are prolific breeders: a female common rat is sexually mature at 8-12 weeks and after a 21-day gestation period will give birth to a litter of 6-11 babies. She can become pregnant again when her young are 3-4 weeks old, and although she may only live for a year, she is capable of having several litters in that time.
A female mouse is also sexually mature at 8-12 weeks and after a 17-20 day gestation period will give birth to a 5 or 6 strong litter. She can become pregnant again when her young are 3-4 weeks old, and like a female rat although she may only live to be a year old she is also capable of birthing several litters.