At the beginning there were a couple of little spots, this was about three weeks ago, I thought that they could have been the result of playing at the dog park so I just put a little bit of aloe vera on them, but then they started to show on different spots and not only on the black but on the white coat as well. I do not see him scratching himself on those spots but what I notice is that is getting dandruff, it is like his coat is going through something and all that comes to my mind is the food, I do not know.