So this thing has been on my buck for a bit and I have no idea what it is. It is really hard though. Does anybody have any ideas? Any help will be greatly appreciated!
Mites are something to be concerned about. They will eventually cause anemia if left untreated. A skin scraping is needed to verify mites.
Looks like a wart. It's not too uncommon to see. I think they are caused by a papilloma type virus. I would have a vet look at it.