We live in a neighborhood and have 4 hens. Two are 2 years old. Two recent additions are about 4.5 months old -- we got them as 6 week pullets and kept them separate for the first 3 or 4 weeks. At this point the young ones are nearly the same size as the older ones. The older two are Buff Orpington and Plymouth Barred Rock. Younger two are RIR and Delaware. They've now been integrated for about 2 months. The older two do a lot of squawking, seemingly at the existence of the younger two. They seem to treat them as intruders and chase/bully them. How can we make them all feel like one flock so the squawking will end?? No other predator issues that would be the problem. I'm due with a baby in 3 weeks and honestly considering giving all 4 away if we can't get a handle on this. As it is now, if they are squawking early in the morning we put one or both of the older ones in a dog crate in the garage for a couple hours so they aren't upsetting the neighbors. Not an ideal solution and not sustainable. Is there anything we can do to fix this or do we just have loud obnoxious hens that aren't suited for neighborhood life?