I recently got 4 chickens, they're about 2 1/2 months now. We have made our coop and run large enough to accommodate at least 6 chickens. Right now we have 4 standards of different breeds RIR, EE, Welsummer and Black Sex Link. I would love to get a couple of the fancier breeds like silkies, polish, frizzle etc. or a couple bantams of other breeds. I'm not concerned with the added chickens laying abilities as having 4 good layers is plenty for the 2 of us. I have a few questions about adding more chickens. Is it best to do it now while the ones we have are young or would waiting until they are a year+ not matter? Are there breeds that typically do not get along? Are there other things I should be concerned with? I read a little bit about how smaller breeds like silkies and bantam chickens will sometimes get killed by the standard chickens. Since I only have 4 would that be a problem or is it usually large groups that do that type of damage?