My puppy has a bad rash that covers most of his face and chest...The area is swollen and red...The bumps are like little white blisters....He is constantly scratching and whimpers if you touch that area....Another puppy out of his litter has the same problem....What is this and is there anything I can put on it that is over the counter?...I don't have the money to take him to the vet right now...

