My chickens will not go outside. I have read a couple of other threads with people having this problem, but it was usually due to cold and snow. I live in Texas, outside of Houston, and its May. Cold and snow are not a problem for me. I have 14 birds. 2 Welsummers, 2 Buff Orpingtons, 2 Rhode Island Reds, and 2 Cuckoo Marans (all 6 weeks old) and 6 Barred Rocks (5 weeks old). They are in a coop that I built in which they have 5.7 sq ft of space each and a very generous enclosed run providing 106.85 sq ft each. I have places for them to roost outside, and I have spread feed on the ground to encourage them. But my flock is unappreciative of all my hard work and will not utilize the run. On occasion one will wander outside for a few minutes and then go back inside. (Usually one of the Orpingtons.) At around 6 in the evening many of them will wander out for a while, then come back in when it gets dark around 8:30, and when they come back in they will all huddle together in one corner. It is presently 87 degrees outside, not a cloud in the sky. Beautiful day, maybe just a bit breezy, but I would think they would like to take advantage of that. When I open to coop door, they rush into the sunlight, lay down and raise one wing. Their chicken-door is open for them all day, with a very nice ramp going from the raised coop to the ground. I have many animals. Cats, dog, goats, and even fish, and I have figured out their patterns and habits. I can not for the life of me figure out these chickens!