Two possibilities are: a clot (but if it's gone on for awhile, perhaps not) - has the kitty be screened for any heart issues, like HCM? they always tell me to watch for trouble with the back legs with this disease. Also, I have a kitty who had his legs go out on him and he'd be dragging them behind him - this was when I first got him. I took him to a holistic vet who did chiropractic adjustments on him and it never happened again. She said he had a misaligned vertabrae. I did about 6 treatments and it cured him of the problem. If you cannot find a explanation with regular medicine, consider looking for a vet that does animal chiropractic. Shannon _______________________________________________ Felvtalk mailing list Felvtalk@felineleukemia.org http://felineleukemia.org/mailman/listinfo/felvtalk_felineleukemia.org