Just back from vet with Sahara! As I suspected, she is NOT BLIND and she DOES have terrible earmites, which I felt was probably the cause of her erratic behaviour! The vet is not 100% that is all that is causing her to walk in circles, but from the looks on the culture slide, it certainly could be! We treated her with the one dose Ivermectin and so time will tell if her circle walking goes away!