all roo's are aggressive,,, may not be all the time,, but they are by instinct,,,, and all roo's will 1 day try to be your alpha,,,,so before i re-homed,, i would at least try to teach it how to act,,, its like teaching a puppy to poo outside,,,,, you dont get rid of the puppy the first time he...
are you going to quarantine the new roo's first?
then,, grab all 3 roo's,, throw them in the pen,, and within 15 minutes you should be able to tell which roo will be dominant, and protect ya girls,,,, that is, if they all arent wimps hahahha