We raise some baby chicks in the barn now they are big enough to go out in the chicken pen, the problem is we builded a nice pen for them attached to barn so they could go out during the day and then they could go back in the barn at night to roost but they won't go outside. We caught them and took them out and all they did was stay out about 1 hour. Next day they didn't go out at all. What.'s wrong with these chickens. Need help bad.