We just started the transition from Nutro Nature's Choice puppy to Nutro Nature's Choice small bites! Small bites looks like rabbit poop, which Rex is very fond of. Ugh! In the little over a month that we have had Rex I have noticed the red is growing out of his nose. Okay that didnt make sense! Rex had a reddish tinge/tear staining from his eyes to his beard, now the hair growing out is white, about 1/4" now. So I guess we just have to wait until it all grows out for him to have a white face, but I believe it is because of the dog food change that he is no longer staining (he was on some cheap stuff when we got him). We are also going with the Nutro bones and treats. He seems to be doing great on it!