I am trying to covert my duck and chickens into one coop area. For a few months we have had just a fence between them so they can get used to each other. The other day I put all the chickens in the fenced in yard with the duck and it went well. They all seemed to get along and hang out.. until I realized I forgot one chicken in the yard. Then once I picked her up and set her in the yard with the other ones, my duck instantly started attacking her. So then I quickly removed all the chickens from the yard. Now im not sure how to re-introduce them? Right now there is still a fence between them. Any ideas?