Okay, just got back from doctor, whew, it was just tapeworm from flea, probably got from squirrel. And, the hind leg weakness is arthritis. I still had her (vet) do a tick disease test just to ease me mind. Preliminary report is all is good, vet will call back this week from sent away lab test, but she is certain the hind leg weakness is from acute arthritis. She gave me pills for tapeworm (nasty buzzards) and arthritis pain, which I already gave! Whew, whew, whew!!! Thanks again for this warning though, Eddie!!