Heh all....I noticed these ulcer like sores on my Chinook's back paws, I notice similar, pink, areas on her front paws...but they only appear open on her rear paws.... she's not limping or licking at them...Is this irritation from walking on the icy snow or could this be a reaction to the sidewalk de-icer used at her daycare center ? Any suggestions on what I can use to heal these areas ??