• The decision to breed mice is a big one. They will require a good amount of time and attention, however it is a very rewarding experience and baby mice are quite adorable. Most mice are extremely fertile, having 8-15 babies per litter! And a pair of mice can produce a litter every 3-4 weeks, I’ll let you do the math on that, it’s a lot of babies. Because mice are not yet as popular pets as dogs or cats it can be quite difficult to find homes for even the most adorable mice. So before you begin, make sure you have room or homes for a possible 15 mice! A female usually will become pregnant within a week of being placed with a fertile male. The gestation period is between 2-3 weeks and it is difficult to tell a female is pregnant until very late in her term when her stomach begins to bulge out. When introducing two mice to each other make sure you always put the female into the male’s enclosure and not the other way around.

• Male mice should be removed from the cage after the babies are born. This is not because the male will harm the babies; on the contrary, he will take on a large part of the childcare. However, he will begin to mate with the female immediately after birth, which can be quite annoying for her and you if she inadvertently becomes pregnant with another litter. Female’s can breed from 3 or 4 months on and even earlier, however this is usually not recommended. When your mouse becomes pregnant make sure she has enough food and water like usual and make sure that she is not in a wire cage as her babies can easily wriggle out between even very close bars.

• The babies are born hairless, blind and deaf. After about one week they start to grow hair and get skin pigmentation. They open their eyes and begin attempting solid food around 10 days old. After 4 weeks they should be weaned completely off mother’s milk and calmed down considerably. At 5 weeks boys and girls should be separated and are ready for their new homes.

• Continue to the next section: What can mice eat?