Hi! We hatched two baby chicks in March, and they are now big enough to be introduced to our 1-year-old hens. We are unsure about the gender of the babies, but all of our older ones are hens. They are pretty much the same size as the others, but are getting roughed around and pecked on a lot. We've been trying to get them together for about two weeks, but every attempt ends in a bloodbath. Any tips?