well i just went to the petstore and instead if gettin the 2 usual feeder mice(kill one and feeed it, save the other one for next feeding) i decided to het 4 and i was just noticing the sex of the mice and it looks to me like i have 2 females and one male(alive, the other one was a fed to mrs snakey) and i just wanted to know before they start breedin w/out me knowin it how can u tell if a mouse is a male or female?