Same problem but it's all my girls. I have 3 all the same age raised from 2 days old together. They are 4 months old now. Everynight when it gets dark we have to round them up or they would stay out all night. Coop is clean we have a 1/4 acre completely fenced so they are free range during the day. Which leads to my second issue, I thought from all my reading and research the hens would be naturally fearful and would stay close to home. Not these girls! We have one girl Nugget, she is such a witch! She bullies all the dogs and is the boss of everyone. She chases squirrels, dogs isn't afraid of anything. She is constantly jumping the 6' fence and encourages the other 2 to follow. We catch her in the tree, on the deck railing and now she has figured out the dog door and tries to get in the house. Any suggestions?