I am wondering what's the best way to integrate three pairs of pullets, all from different sources, but approximately the same age? I will be buying started pullets in the spring - 3 different breeds, a pair of each, from three different breeders. I don't currently have any chickens. The coop and run is not previously used. Will I need to keep them in 3 separate areas for a few weeks, where they can see each other but not can't actually physically interact until they get familiar with each other, or can they all be in together at once? The coop will be 50 square feet and the run will be 430 square feet. Any suggestions?