I picked up one of my oegb roosters today because it looked like he had poop stuck to his bottom, it was not poop but a clump of these weird black round bugs, I dont think it is mites
Hmm. That looks like mites to me, it could also be lice or fleas but they're all treated the same way. I would just sprinkle mite dust on all your birds and that should get rid of them. Good luck!