My husband and I bought four new hens to add to our exsisting flock of six hens and two male ducks yesterday. The hens we already have are picking on the new ones so bad. Wont let them eat or drink, chasing them, picking feathers, even actually fighting. The ducks dont mind the new hens fortunately. We are going to put the new hens in their own pen/coop this evening to give them re'coop' time. Any suggestions on how to get them all to get along?