I have a 8 1/2 month black lab and noticed the other day some pink pigment (skin) on his upper lip. I thought nothing of it, assuming maybe he got nicked in playing bitey face with his cousin. Well it looks like the pink spot is getting bigger and bigger. Almost like the black is peeling off exposing pink skin. Has anybody ever experienced this? Or know what this could be? Do dogs get chapped lips (is that silly) or lip sores? Please let me know if you have any info...it may be off to the vet for us. Thank you.