What's going on Liz? Sorry I don't know much about rosy boas but the sand sounds suspect to me. Why don't you google" breeders of rosy boas", then ask the breeders. Also contact the big bp breeders and get their takes and possibly references from them. Garrick Demeyer, Ralph Davis, Justin Kobylka. Maybe just email these guys your requests and see who responds. Good luck.