Cochin hens

I have two Cochin hens, with colorings similar to a Barred Rock. They were full grown, 2-year-old hens when I got them. They blended in fairly quickly with the other hens, with a few typical little acceptance squabbles from the other hens. They have become the most aggressive in the bunch, fighting with smaller hens. They also killed a couple of younger poults that the other hens never bothered. I was surprised! I am sure that these two hens are probably an exception to the typical Cochin, and their behavior (and the "torpedo eggs") are probably why the previous owner was selling them.