At what size do the Zebras start to breed? I have a group of 6, which looks to be 1m/5f, about 1-1/2" to 2". The suspected male is the only one with red and very bright yellow on his flanks, and sligh green coloration around his mouth area. All of the rest just show a slight yellow color, no hints of red at all, so I'm assuming female. I've been told they are very prolific once they begin to breed.