Should you decide to breed the Fancy Rat, then it is good to keep in mind that male and female Rats reach sexual maturity as early as five to six weeks of age, though it is generally best to wait until 16 weeks or later for the safest breeding of a female. Rats should be kept in single-sex groups. Females come into season every 4-5 days and exhibit signs by raising the rump when stroked, and/or vibration of the ears. When your female is in heat, remove the male you wish to use from his cage, and put him with the female in another, separate cage. Watch carefully for signs of fighting. If mating is observed you may leave them together for 1-2 hours, then return each to their usual cages. Do not leave males and females together permanently. Gestation is 22 days, and by this time a pregnant female is very visibly pregnant. She may begin nest building and show mild aggression to her cage-mates, but it is safe to leave her with her usual companions if you wish. Alternatively, place her in a cage of her own with a nest box and plenty of shredded paper towel to use as nesting material. The birth is not usually witnessed by human eyes but you will know when she has given birth by shrill piping and cheeping noises coming from her nest. You may tempt her away from the nest with a treat and then take out the next box away from the cage to examine the babies. Average litter size is 6-12 babies but it is not unusual for as many as 18 to be born. Remove any dead babies, count them all, and replace the nest box. Feed the mother on a high protein diet during lactation, and you may supplement her with infant soy formula daily, which she will appreciate. The babies open their eyes at 14 days and soon begin to explore their surroundings. Although they will begin to eat solid food while still in the nest, do not take them from their mother until 4-5 weeks of age. Continue to supplement with soy formula until this time as the babies will also benefit and will help to take some of the strain from the mother whose condition may decrease dramatically by the time her milk supply ceases at 4 weeks. Handle the babies every day to accustom them to humans and stimulate their natural curiosity. This way they will become gentle, confident and affectionate rats that will delight their owners and grow into well mannered, socialized pets. Separate the males at 5 weeks and remove them to their own cage. The females can remain with their mother until they go to new homes. DO NOT leave them together any longer than this as the females may become pregnant as early as 5 weeks of age. At 6 weeks of age the babies will have developed their social skills from remaining in with their littermates in sex-separated groups and are now ready to go to their new homes. |