This is our first year raising turkeys. We have 4 BBW that have been attacking our ducks and chickens. Is this nornal? Tonight I put the turkeys in a fenced pasture so that our mama hen could bring her ducking out to forage. A full grown chicken got into the yard with the turkeys and was immediately attacked. They had her penned in the corner and were pecking her for all they were worth. I had to run into the yard and push the turkeys away from her to rescue her. She had her comb torn up but luckily i got out there in time. Normally they free range with my other flocks with no issues but in the past week they have turned on a baby roo, our duckling and now this chicken. What can I do to calm this down? BTW, they are 12 weeks old and mostly toms. We also have two BBB and they seem to stay out of the ruckus.