Hi - Has anyone out there had this problem. I have 4 ducks - 2 male,2 female.They have lived together since they were born.As of yesterday the 2 males are fighting and one is brutally pulling out the others feathers and won't let him near any of the others or in the pool.They fought for nearly the whole day I thought they might kill each other.The one who is weaker now is bleeding alittle from his neck and spends his time in a corner with the chickens afraid to go anywhere near the other male.The other one will charge him and fight with him if he comes anywhere near the others.Is this normal? Why did they start fighting? Is there anything I can do to stop this behavior?