I absolutely love my boys. They run a good flock and are worth 100x the small amount of feed they eat. They keep a good eye out and keep my girls calm. I love the way my girls swoon over them.
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Your older gals may be of great help in training your young cockerel. When do you integrate? If you keep him with the pullets he grew up with he may be a hormonal pain, and that won't be fair to him, you and especially the pullets. The old gals should help wonderfully, giving him the whallops he needs and teaching him some respect. They will also be helpful in choosing or rejecting.
Push the decision off on them

He will only improve with age IMO. They grow into their own, become stunning from 7 months on. Easier to find a home for also. All you can do is try, one way or the other. Rehoming is tricky. I do a lot of vetting and still new owners don't get it right. Everything wants to eat chickens. I keep posting and eventually get the best possible outcome. Sometimes it takes months. Take your time, don't be desperate.
I'm hoping you try and keep him if you can. Nothing like a beautifully functioning flock. I hope to never go without a roo.
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Terrificly dorky and perfectly imperfect but also fearless and priceless.
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