My friend bought 7 chicks and ended up with a rooster. the rooster (less than 1 year) started attacking her kids. Fly in theoir face and scratch type of attack. Her chicks free range during the day and coop at night. She barely intercepted an attack on her 2 year old. She brought the rooster to a horse farm where she boards her pony. Is this common? What do you think was going on?