My outdoor rabbits can get in fights frequently. But they rarely if ever get scabs. When they were little they would bite each others ears and butts over finding out which of them is the boss. I think your rabbits are trying to decide who gets to be the top dog(bunny). But they are both dominant. Hopefully they will work it out soon or you may have to separate them. They shouldn’t be breaking skin, rabbits usually bite and pull fur out, but the ears are more vulnerable and will get scarred up. They could get infections from the sores so you don’t want them biting all the time.
