I'm so sorry. That happened to us too a few years ago. What kind of dog do you have? We have a German Shepherd mix; she killed a hen the first or second day we had the hen. I was able to train her not to touch the chickens. Now she gets along with them fine, and loves her role as "Chickherd" (not Shepherd). She is a little older now and now I can even get her to drop a baby rabbit or chipmunk she has found, without her harming it. So it is possible a lot of times to train them.