Hi, I have a 4 month old chihuahua that has very thin hair on his head and chest .Took him to the vet so its not mange,skin is not irritated or red,its like an all over even thinness of his fur on his head.Could it be allergies to his food?Hes not itching but if i scratch him he will seem like i hit a good itch spot. He is very healthy eating well hard stools and very energetic. I feed him Natural Balance ultra premium small bite kibble and wondering if switching him to another formula like the venison,duck,or salmon might help. This is good quality food however it only has a min of 21% protein and i mix with same brand canned food which has an additional 8%.could he need more protein in his diet? I just cant seem to figure it out what can i do to help him have a fuller head of hair
. I'm also thinking its because he is teething and also losing some puppy fur but the rest of his body is very thick. Any idea and suggestions would be great thanks.