I have a 2 year old neutered male whippet. Compared to his littermates, I noticed that his coat looks thin. Because he is mostly white, he looks pink in his stomach and chest and his grey spotty markings on the skin is visible throughout the body. He is in great condition in terms of health. I have been feeding him a premium baked kibble made of human grade ingredients which is mixed with boiled meat, shreaded vegetable, Missing Link and Vitamin C. I think he is consuming enough fatty acid and vitamins from his food and supplement. I heard that sometimes thin coat is a result of a thyroid problem. He is on a skinny side among whippets. Do you think I should have him checked?
Most likely your pet does not have a thyroid probelm. Dogs don't have overactive thyroids, only underactive. Have him checked by the vet. You can try derm-caps. vetcare