I have a year and a half old Female Bull Terrier. She's spayed and in good health. But about 2 or 3 months ago her skin and hair have been turning rust color. She doesn't itch or scratch any of it. It's kind of blotchy looking. No hair loss and I feed her Embark Turkey. No people food either. I took her to my Vet and he said it's nothing to worry about. Her color is all white with brindle eyes. Her coat isn't white anymore. Please Help.