I have 1 australorp and 2 speckled Sussex chicks 10-12 weeks old. I have them in a large dog crate and they have lived there since the first of March. I keep sand on the floor and make sure water is clean and fresh and changed daily. I pull the cage out of the garage when the weather is sunny. We have had more rain than I ever thought we could. In the back yard I have 3 very large, very opinionated orpingtons. Between 2 and 3 years old. The chick(ens) as of yet are not even HALF the size of the orps. I have tried to think of ways to introduce everyone. The cage is incredibly heavy. I drug it out into the back yard once. The grown girls didn't even come close to the chicks to investigate. Before I got the chicks I bought dog crate wheels. I applied them as directed and the weren't stable at all. So I tried securing them with wood and wire. The one time I pulled them into the back yard the wheels folded under and were useless in addition to acting as "brakes". By the time I finally got them into the backyard I about had a double hernia and the chicks were close to a nervous breakdown. I want so bad to integrate them into the flock and I dont think I am being too conservative in saying the others would seriously hurt them. Like I said they aren't even half the size of the others and they are big and bossy. The cage is too big to put in the run and I am going to HAVE to find a way to get stable wheels on it. But in the meantime I have been noticing quite a few feathers at the bottom of the cage in the mornings so I dont know I'd they are bored or just sick of being in that cage. Yesterday I filled a treat ball with freeze dried soldier flies and hung it from the top of the cage as a boredom buster. I do go out and visit with them frequently. How big should they be and how to introduce them. I dont know how good an idea it would be to put them in there at night and let everybody wake up together. They aren't that clueless I dont think. Sorry for the long post