I bought a couple ISA Browns from a friend of mine this week. I have a 10x10 coop that my other six birds have been in for the last 3 weeks, so there is a lot of space for everyone. The new chickens are probably about a month younger than the rest. I brought them in at night, when the others were asleep. They were a bit stressed for the 5 mile ride, so I just set both of them on the roost, and they were good... Next morning, they were still on the roost. I assumed they had moved around a bit. Today (3rd day) I watched all of the chickens during my lunch today, for about 30 minutes, and noticed that my RIR and Wyandotte were chasing them away every time they got close to the feeder. Plus, my two EE's were a little aggressive too. I suppose that's pretty normal. No one was bleeding or anything, but I saw the Wyandotte get a mouthful of feathers at one point. I added an extra feeder, which seemed to help. Does anyone else have any other tricks, ideas, advice? I hope they will all get used to each other in time. I've only noticed occasional aggressive behavior among my original six. Any anecdotal stories appreciated, too.