Original poster did you say itchy, dry skin, overweight, poor coat, thin coat - loosing air( oops that should be hair lol ), odor? if the above apply you could be dealing with thyroid. My lab had those symptoms and she has thyoid problems according to the test. However, should mention we had bad fleas that yr and money was tight so she was on cheap food. Strangely enough. We moved flea problem wasn't an issue anymore and better food. She got her coat back. She keeps it unless we move her inside. Gas heat seems to dry her out. Also did research ~google on fleas came up with food site.