How old should a male rat be before the testicles start showing?
How old should a male rat be before the testicles start showing? Other Pet Discussions
I got a pet rat from Petco a few weeks back. My cousin got one the other day. Her rat and my rat are definitely males but hers is older. Enough were her rats testicles are prominent. My rat's are not. He's a young rat so I am wondering, when should his testicles be prominent?