I want to add to my flock in the spring. I already have 6 RIR layers 1 RIR/SLP pullet and 1 RIR/SLP roo. I want to add from My pet chicken 1 Blue Cochin, 1Black Copper Marans, 1 Easter Egger and 1 Buff Orpington. ( all day old female chicks ) How do you think this mix of birds will do? They will be in a 60 Sq ft coop. 10x6x8 and a 20x40 run. They will free range only a few times a week due to predators. I like the idea of a mixed color of eggs. Any opinions?