Male and female rats both make good pets. Females are smaller in size and more slander in shape. Female rats are naturally curious creatures. Hence they are more active compared to a male rat. Females like to explore new things such as going new places or doing new tricks. And because of this reason, female rats are easier to be trained to do tricks or to perform in a show. Female rats like to be clean. They will decorate their own cage and groom or clean themselves very often. Their fur is also softer and also gives less odour compared to male rats. On the other hand, male rats are bigger in size and more robust in shape. Although male rats are not as curious as the females, they do still love the company of human. Males are normally happier sitting on your lap and having you scratch their head. Keepers must remember not to put male and female rats together if you do not wish to breed them. Rats breed like hot cakes and easily gone out of control. Sex the rats that you are going to get yourselves or go with an experienced keeper so avoid getting the sex that you do not wish to get.
Basically the only way to differentiate a buck (male rat) and a doe (female rat) during young age is by seeing the difference on the sex organ. The sexing can be done at 4 days old onwards. Testicles are visible on male rats and nipples are visible on female rats. However, it is hard to tell the sex of a rat by looking at the reproduction organ (penis and vagina) when it's young, but by looking at the distance of the urethra and anus can roughly tell the difference. A doe's urethra is slightly nearer to the anus compared to a penis to the anus of a buck. A doe's bottom will shows a V shape as for male will be the shape of a W.
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