I have a mature Easter Egger rooster and an opportunity to get 2 young Salmon Faverolle and Mille bantam roosters. The Easter Egger is 10 months old, mildly agressive with me. The new roosters are about 4 months and were raised in separate pens. I have 20 mature hens, and 17 month-and-a-half old pullets in the flock. Does anyone forsee this being a problem? How would be the best way to introduce the roosters to each other? I'd really rather not have to build separate pens.