Hello,
Sorry to hear about this problem.
It is very difficult to say what could be the problem. Certainly, I do not want to jump to any conclusions that we have a serious neurologic problem on our hands, but, I will caution you to keep a close eye on her.
Another possibility is an allergic condition. It might not be such a bad idea to try giving her some Benadryl (an over-the-counter antihistamine) to see if it helps. The dose is 1mg per pound of body weight. You can give it every 8-12 hours. Keep in mind, if any other signs of illness present, or the behavior is getting progressively worse, I need you to get her to a veterinarian immediately. Even a course with a steroid may not be such a bad idea. but, no guesses. Due to the unusual presentation, keep a close eye out.
Hope that helps
Please let me know if I can be of any further assistance.
Veterinarian
UC Davis graduate, Canine and Feline emphasis, Dermatology, Internal Medicine, Geriatrics