Welcome to BYC. Glad you decided to join our flock. X2 on drumstick diva and TwoCrows. There is no reason to keep an aggressive cockerel. You don't want to breed that kind of aggression into your flock or risk serious injury to someone (like an eye put out by a spur). Also, he will almost certainly become very hard physically on your hen at some point; over-breeding them, biting and plucking the feathers from their backs and necks, battering them, and even potentially serious injuring them. And it is virtually impossible to break an aggressive rooster from his aggressive ways. The only reason you really need a cockerel is to fertilize eggs for hatching, and you want a gentle cockerel for that. Also too many cockerels will create the same physical risks for your hens. The recommended ratio of roosters to hens is 1 rooster for every 10 hens. I currently have 25 hens and no roosters in my flock, and I get loads of eggs without the aggression, fights, biting and plucking of feathers, crowing in the middle of the night, feeding of unproductive mouths, drop off in egg production, and over-breeding and battering of hens that goes along with having roosters (especially too many, or aggressive ones). My hens are stress free and enjoying life without a rooster. Please feel free to ask any questions you may have. We are here to help in any way we can. Good luck with your flock.