primobellator
Active Member
He's about to be 3 monthssame sex so another boy ...... how old is he?
around his age, or less the 12 weeks old is best
http://www.ratshackforum.com/forum/showthread.php?t=32368 and joinrats.com
but if both are under 12 weeks old, they can just be put together because babies see unfamiliar rats as new playmates