It's possible she has hyperthyroidism. My cat lost weight and was really boney, hair loss, and color was getting lighter (siamese), and took her to the vet.. was told she had hyperthyroidism. The ear treatment was not helping. It doesn't actually cure it. So we paid 1 k plus other vet visit fees for radioactive iodine treatment. Ms baby is 14 years old, super healthy, hair has grown back, is a healthy 10 pounds, and full color like before.