We are new to being chicken owners and know very little. We live in north Texas and just received our chickens from our neighbor who moved 2 weeks ago. He gave us 6 hens one of which died the next day. We're not sure if it was stress or heat related (it was 104° that day) but e figured out how to keep them cool with ice jugs. We need to build them a bigger coop because theirs is tiny and hard to manner when cleaning. I think they are approximately 6 months old and 3 of the 5 are now laying. The only thing I'm concerned with is one of the hens had become very aggressive with one other hen and my daughter. Neither will be anywhere near the aggressive one and it will charge and peck them. What can I do to calm her down? This was all of them the day we received them This is 4 of the 5 we still have. They free range most of the day. Can you tell me what kind if hens they are?