I have a young rooster, 4 months old, cuckoo marans, that acts different from everyone else in the coop. He has coordination problems, when outside he doesn't move around much but stands in one spot and his head will slowly sink towards the ground and he keeps his eyes closed most of the time. Has anyone heard of this type of behavior? He's very low in the pecking order and hasn't tried anything with the girls at all. I do plan on culling him, but wondering if I should do it sooner rather than later?