hey tiger, i know your husbandry is good so it might be something genetic. i had this happen to one of my first female breeders, she stopped eating and became lethargic. it just got worse from there and she passed away a couple weeks later. sorry to make things sad. if it happens again i will go to a vet at once this time. dr. scott stahl keeps rhacs and might be able to do something. he is located in northern,va but a phone call might be helpful.

hope everything works out for the best

thanks
vaughn