I have 10- three day old ducklings, five male and five female. I got a pair of male and female for each of the five breeds I got. My smallest duckling, the male mallard is always pulling on the the other duckling's feathers. So I though if I put two two biggest ducklings in with him he'd stop. So I put the two rouens, which are at least twice his size, in a separate brooder. He was fine for a little while but then about five min later I looked in and he was tugging on feathers. He didn't pull them out he was just tugging on the feathers. What should I do?
