Hi this morning I went outside to feed the chickens and ducks when I saw my drake and rooster ripping each others feathers out! And then it got worse they jumped at each other and since the drake is heavier he crushed the rooster! The drake then beat his wings on the rooster while the rooster tried to struggle free! The rooster escaped and then got caught again! this time the drake had him and was standing on the roosters neck suffocating him! If it wasn't for me braking up the fight he would have been killed! What caused this? Will it happen again? And should I separate them?