All my girls of various breeds did the chest bump thing as chicks.i have done a bit of reading about them and see they dislike confinement and are cold hardy, both fine traits for my flock. i’m a little concerned about the flying thing, as we keep our chickens within our 1 acre of fenced property. my two chicks are definitely characters - more active than the other four, and they like to flap around their chick tractor outside and bump chests (hopefully not because they’re boys!).
My Spitzhaubens are now 8+ weeks. I love them and their unique personalities. 3 are cockerels tho. I will probably try to find a home for one. There's a poultry swap next month.
I haven't yet integrated them with the big hens but they have all been able to see each other thru the fence for 3 weeks now, I guess it's about time. I've let two of the bantam hens in, who are now smaller than the spitzes and that was fine. All the other 7 hens are big and mean. My run is 1000+ sq. ft. with lots of obstacles, several feeding stations, etc. I guess I'm waiting for the Spitzes to indicate their small coop/ run area is too small.