Your puppy is adorable!! What cute pictures! Glad to hear you have decided to switch his food to a better brand. Just a quick question? Are you actually " seeing" hair fall out or are you noticeing that he is thinning out around the face? When I first got Laci I thought she was loosing hair when infact it was just her color breaking and it looked thinner around her face where she was turning silver? I have actually seen that posted several times here and if this is your first yorkie that may be the case and there is no need to worry because turning silver and the hair looking thinner and changing is totally normal