Ok this isnt tear staining its around his mouth and i cant figure out what it is from. I have heard that minerals in the water will do it but he drinks bottled water so that shouldnt be a proublem, he dosnt eat wet food or really anything that isnt his dry food, i havnmt made and changed in the dry food either so i am just at a loss of what its from. Its not as dark as tear staining it but it still shows up on the white so if anything has anyideas of what it might be from or how to clean it (i just gave him a bath like 10 min ago and its still there) lemme know please