Can a dog get an abcess from a snake bite to his head.? Swelling,sore draining today. We have massage a drained it three times today. Dog seems to feel good. Hasn't stopped eating. After the draining it goes down for awhile, then fills back up. We did not see the dog get snake bitten. We had previous dog to get bitten before and it looked like the same thing until. Has lose hair in this area. Looks like a big swollen boil. How should we treat it, or if there is a home remedy, or vet should see him?