my silky terrier has skin problems, too, and so many good dog foods I tried on him caused him to have either a rash
blotches. I finally decided it's the fish most good dog
foods now have in them and I switched him to Wellness Simple Food Solutions. It's for dogs that need the least ingredients in their food. He eats it well, but, the kibble is not tiny, so, that could be a problem for Mich's chihuahua, unless he could break it up.