I have 7 chickens and 3 ducks. They are all female, live together, and get along well. Someone wants to give us 2 adult ducks (rescue). One is female, the other male. I am worried that if we take the ducks, we will no longer have peace and harmony. I cannot tolerate animals getting injured. However, these 2 ducks do not have a home and may lose their lives. Do I try introducing them to my flock or are the odds against them getting along?