My dog is turning pink! #2?

Phone the vet for advice. If not go take your dog to the vet. It could be related to the colour of your dog. Do not get wound up or the dog will pick up on it. It could be a pigmentation problem common in that particular breed of dog. I have a cream & coffee brindle Whippet puppy who had a black nose when she arrived but now she has been here & had playfighting & digging practice it occasionally goes pink.