Sexing Rats

Sexing Rats

The visible differences between male and female rats becomes more obvious as they mature.

However, the distance between the anus and the genital is always much greater in males compared to females. See photos below.

Two week old buck

Two week old doe

3 week old doe

3 week old buck

Females also have nipples(6 up each side of their belly), whereas males do not. Sometimes it’s difficult to see nipples, temporarily dampening the underside of your rat with a face cloth can help.

Adult female

Adult male

Male's testicles also become very obvious, although young rats retain the ability to withdraw them (when scared).

Female

Male