It can be frustrating, but don't give up. I had 3 of my 4 females breed successfully this year, but my prize girl, a Lavender Albino Het Dreamsicle, went cold on me. My advice, if she goes back on food, feed her aggressively and get her weight up. Personally I would wait until early fall and start pairing them again. Hang in there, things will happen! Good luck,