Ok, im starting a mouse colony and with my experience, my mice to produce best and grow largest when their main diet is dog food. A friend of mine however, told me that i shouldnt feed my breedng ball pythons mice that have been fed dog food because it will either make them infertile or produce mostly slugs. Has anyone ever heard of this? i dont know, i sounds weird to me but if theirs any truth in it i really want to know.