Yesterday we finished the new run and moved the hens into their new enclosure/house. I made them a ladder (as shown) yet they don't seem to know how to use it! We moved them at night (yesterday) so put them in the house ourselves as it was dark. This morning they didn't use the ladder but instead jumped/flapped down into their enclosure and this evening they haven't attempted to go up to roost (even though its almost dark) Instead they have chosen to perch on the rail of the table under their house! My husband is now picking them all up and putting them up to roost. They didn't have a raised house previously however will they learn how to use this? Is there anything we can do to encourage them or is there something wrong with the ladder made?