My dog Ren is an 80lb Lab mix. We have been battling fleas this summer as most everyone has. He has chewed a spot open on his tail that I have been treating with Sulfadine a hot spot medicine, but I think it may be infected. Right now I cant take him to the vet for at least a week due to money. I can get antibotics at the feed store where I work. I was wondering if anyone here knows what would be best to use? We have PenProG, Tylan 50 and 100, Duramycin, and LA2000. Or another treatment I can do for now? Today we put antibotic cream and vet wrap on his tail that he promptly removed. Told DH he wouldnt keep it on Can anyone help my poor boy? Should I have put this under emergencies? Sorry if I posted in the wrong place.