So its my first year having chickens and i am having alot of problumes. I have two rooster one big black austrolope and a smaller white leghorn. The black you is on top of the pecking order i think and the white is closer to the bottom he getts picked on alot but never anything bad. So i went into the chicken coop today and there is blood every where on the walls on the floor on the heat lamp ect. So i though the black rooster was picking on the white but i looked and there is a thumb size gash on my black roosters back bottom of his neck. What might it be from and what should i do?