Can someone suggest what the cause of this could be? Or how to treat it? Brody has had an issue in the past but it was more of a bubble shape blister we had gone to vet for and prescribed medication for.
That looks like it from licking his paw, he may have a yeast infection in there. They make chlorohexidine wipes I think that you can wipe his paws with. Try to keep him from licking his paws sometimes that's caused by an outdoor allergy sometimes they lick their paws from boredom.