I have a new chicken coop and am having a hard time getting my chickens to go up the ladder into it. It is a chicken tractor so I have not been able to move it. I have there food in it and they go in it to eat put not to roast at night. It has a door on it to keep them in wasnt for sure if I should put them in there with the door closed until they get use to it. I am new with chickens and need help..