Wanted to let you all know that I took Rusti to the vet. It turns out that she has a vestibular disease. Cause is unknown, but it occurs in late summer or early spring.2-6 week recovery period.It's onset is sudden. It is an allergic reaction to something. She was given a series of shot's, and we have to keep her confined for a week to 10 day's. Her balance is coming back a little now. Thanks for all of you concern.