So, there is this odd thing my chickens do that confuses the heck out of me but also cracks me up. Two of the chicks, seemingly at random, will suddenly start flapping and then running to one-another with their feathers all ruffled and neck feathers up as if they are about to have the biggest battle of their lives... Then stop face-to-face, stare and... Lightly peck one-another on the beak before moving on. They also do the same process with the flapping and charging, but jump up and start kick-boxing for a few seconds before suddenly stopping practically as soon as it started and continue foraging together as if nothing happened. Is this normal chicken behaviour? Or are my youngsters just crazy little things?