I have a merle chihuahua. I have heard about constant problems with these dogs after I bought mine. She was very playful for the first year of her life, then she started going blind and was having difficult getting around. I took her to a vet and told me she had an inter ear infection! We have her medicine for 2 weeks and still no difference. Now she does circles every time we let her down! Only turns to the right and does it until we pick her up ! Please help ! What should I do to help her?!