Alot lot of breeders BIG and small DO put different males in with the same male. They will run different Dominant morphs and co dom morphs to the same female trying to reduce the number of normals they produce in a clutch. You can get 2-3 or more morphs from one female if you are lucky. As far as simple reccessives I have no clue. Unless they are possible double hets or actual double hets they may run different males to the same girl.