Poultry, especially chickens will return home to roost in the same place as long as it is a safe environment. They are not particularly smart, however they are full of instinct.  If you raise them in a coop they will have a strong instinct to return in the evening to roost. You do not have to train them to come in at night or to leave in the morning.  They will always follow the routine unless they are attacked at night inside the coop. This door will allow you to rest assured that they are safe inside and have access to the outdoors during the day.