I apologize in advance for a rather long post. I have a rather perplexing situation and need some advice. My new hens are not integrating and I don't know what more I can do. I had 3 hens: 2 Rhode Island Reds and 1 Barred Plymouth Rock (all eight months old and laying well) and wanted to expand my flock. Two weeks ago I brought home 3 twenty-week old Black Australorp hens from a very reputable source. I have a 10'x11' run and 20 square foot roosting box. I let the hens out into the yard to free range for a couple of hours at the end of each day. I separated the 3 new hens in the existing coop/run for a week. There was not very much interaction between the two sets of hens, but the new hens were clearly freaked out by all the newness. After a week, I let them all out to free range for most of the day. The older hens chased and pecked at the new hens in the yard for a long while and then pretty much ignored them. While they were all out in the yard I removed the separation and hoped that they would all get on with the task of integrating when they returned to the coop. No such luck. The older hens went into the roosting box at dusk as they normally do, and the new hens did not return to the coop. Instead they flew into a bush and roosted there, seemingly with the intention of spending the night there. I grabbed each of them and put them in the roosting box with the other chickens where they huddled in a corner on the floor. The new hens have not emerged from the roosting box in ten days. After the older chickens leave the roosting box in the morning and go into the run, the new hens fly onto the roosts and pretty much stay there until the older hens return to the roosting box for the night. The new hens then jump down from the roosts and again huddle on the floor. There is ample roosting space in the roosting box. After a day of the new hens not leaving the roosting box, I put food and water in there because I was worried for them. They now come down off the roosts a few times a day to eat and drink, but then return to the roosts. Sometimes, but only rarely, they peak out to see what is going on. The older hens enter the roosting box during the day to lay eggs in the nesting boxes and glare at the new hens, but otherwise do not interact. I have introduced into the coop/run lots of grass clippings and leaves, new roosts in the run, and have provided lots of distracting treats and hung cabbages. The older chickens are happy and distracted, but the new hens are just not venturing out. Is this normal? It has now been 17 days since they arrived and my new lovely hens are just not relaxing. Will time make a difference? I would greatly appreciate any advice.