What is your program or method of operation for sifting out the "bad" ones? Do you keep them in a mixed flock and see how they act around one another? Do you go in there and see how they react to you doing things? All the chicks I'm raising right now will either be kept for egg production or go in the freezer. I got some new breeds and am hoping for one or two roosters that will work out for us. I just wish I knew of an exact equation for figuring out which rooster is nice and which ones aren't.
Not an expert, but have gone through a lot of cockerels in the last two years and been flogged by roosters as a child. Right now I have two boys I love from the same hatch lot, two I tolerate from a different line, and one that I allow to stay (but without his freedom) for now.
Out of a group (21 or so on my case, about 50/50 girls to boys), I watch the boys and how they react to ME.
1. I'm high-stepping over the fence, over them, forcing them nicely to make way for me and the food and water. This can be perceived as threatening to a cock or a roo, so I see who pecks to try and stop me, if anyone runs towards me to confront me, and who just moves aside normally as needed.
2. I'm also nicely picking up some of the group, regardless of resistance; do any boys object and start pecking hands/flaring necks at me to defend the group or themselves?
I don't care if they fight one another, that's normal. There has to be a boss and I usually pick someone near the top who has demonstrated he is ready to be a leader. But I'm not part of that competition and anyone who acts like I am, or acts like I'm a predator, gets voted off of the island.
Best roosters I've had call the hens when they see me coming with food and water, let me step all around and over them without any reaction other than making sure they aren't stepped on, don't flare or peck at any part of me, my feed buckets, my water jugs, or anything really that isn't another rooster.