Hello- I'm new to the chicken scene and adopted two Barred Rocks from someone who had to get rid of them. After having them for a few months and figuring out the ins and outs of chickens, we want to get two more birds. I'm a bit nervous though, we haven't ever introduced our two girls to any new chicks, and i've read that barred rocks can be bullies. Does anyone suggest any good egg-layers that would mix well with the two we already have? Any advice appreciated! Thanks!