My 12 week old buck fawn has a deep abcess on his front leg. I have Tylan 50, but am unsure of the dose. He weighs appx. 45 lbs. (he was born premie, and has been small) my vet is out of town. I also have Neomed 325 (neomycin sulfate) and Duramycin-10 (tetracycline) for use in drinking water...