Don't feel too bad, I've got two females doing the same thing right now. Everyone else is leaping from their tubs for food while they could care less. They were two of my best eaters and decided they would take a break. Some just do it as they transition into "ladyhood". Mine just refused for the 6th week Thursday, Just keep an eye on their weight to make sure they aren't dropping rapidly and they should take when they are ready.