Do you have hens,they look as if their fighting for pecking order,or if you have hens probably roos fighting for the hens around half grown they should crow and look as if they would try to mate with hens at their age(Practice anyway).Their tails look curly.I say cockerals.Same as roos just younger.
we have a pen inside a pen where everyone can see each other until they are big enough to go in with the older birds. I just recently let a group into the big pen so everyone is jockeying for position
