ABOUT YOUR BIG BOY , what kind of challenging are we talking here..? he comes at you with one wing down on the ground & going sideways at you..? & acts like he is trying to chase you away or what ever ..? if thats it ..?he is becoming a bad boy , if you want good boys i would pen them up when they begin to chase all the hens around or better yet pen them up in a good size pen for their own good & just before they start that crazy stuff , leave them in until they are over a year old, that way they wont become mean ,with most roos that is ,and it also all depends on their father and his temperament.! so hopefully by the time you let them out with the hens they will have gotten over the teen age stage were they can be such crazy jerks, but if they are from mean birds they may never be anything other then mean, so thats what i found out works the best, with the least amount of effort, so in the long run they get to spend time with you when you go to feed them , and i take that time to talk to them, so they get to know me, i always use that time & use the same words with my young roos, i tell them they are good boys, so just in case they ever do something bad , my yelling at them will be quite effective HA

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@Diannastarr my big boy was an accident. He's an EE with a pea comb so there's potential for the blue egg gene and I want that. However, 2 of the Aussie chicks I got from BlueBaby are cockerels. One blue, one black. That's 2 too many.
My coop maxes out at 9 maybe 10 chickens. Before I got the chicks I had 5 pullets and the ee cockerel.
I don't know that I would be able to breed the Aussies as my husband isn't agreeable to the constant rotation of chicks and the potential need to cull regularly.
The big boy has been free ranging with his girls his whole life, but he has chased my youngest grandson and has been aggressive with me more than once. He also crows a lot and to be honest that's mire an issue because I can stand up to him. If he won't back down I refuse to waiver, but I'm concerned nonetheless. Obviously there's no guarantee that any of the others will be any better, but I'm torn.
GOSH yes torn indeed..! no if they are attacking any one , i say pen them up right now, thats not to be tolerated ever..!!! yes i totally understand, its hard to make the choice to kill any live being, i my self wont do it ,especially the babies i hand raise, i recommend what Dsertchick said to slowly Tame them like i did with my a wild horses , but I never had that much time any more ,and especially dont like to get bit...LOL..

so maybe if thats the way your life is like mine its just easier to pen them all up and use your time feeding them to get them to know you and interact with them when feeding and talking to them like you would with your dog or cat, i must say the food helps to create that bond with them, my RIR & NHR i had put them into a giant pen 40x40 feet, they have a fun home with a tree for shade and all kinds of stuff to perch on & a swing , its a rooster environment & not like i keep them in a small pen by any means, they have feelings like we all do & they get to see the whole flock every day and the hens drop by to chat with them...lol. but now when i open their pen door they run over and like to peck at the food bucket...lol.. thats the most aggression i get from them, & they dont mean any harm , they could live their entire lives in this special place we built for them , but they dont mean any harm ,so after the time passes for your roos & you wait and see if any of yours emerge acting mean ..? but one thing never challenge them, it just makes them meaner, they start to think you or all humans are their enemy, but i guess the feeding helps them to see you as their friend & you as their pack leader, my roos i have kept that way , i can go right in and pick them up with out any problems no matter what age and even if i had never touched them ever before they are fine ,no challenges & no bits.! im seen as the head roo, but with your roos this kind of time will give you the time you might need to make up your mind wile they grow older plus they might change..? or which ever you choose to do you had some time to think it over , i had a very dangerous new Hampshire red roo back years ago ,i got him by mistake in a group of sexed chicks , he was ok with me , and i could control him with my voice and certain words that he understood ,but with any one else he tried to kill them and always drew blood , so after all of that he did live in a nice pen big for most of his life, i actually like him & gave him a good happy life ,he was about 4, and things were changing after my husband died , and so i had my hired hand shoot him in his pen wile he was eating , he never knew what happened , so dont feel bad if you choose that way out , its seems the best way to go i have to say they never even hear the bang..! and its over , i buried my roo with respect for his fearless spirit and asked him to keep watch over all of us my flock & land. as im sure he still does . but maybe ask about the temperament of the roo your chicks came from, that will give you a clue about your roos possible future temperament ..?
