I got them all as mature adults, varying in age from, based on my knowledge and assumptions, 1 to 3 years old. I recently added two roosts, on with a 2x4 and another with a 4x4 wood post, but they just don't seem to know how to roost. I don't think they have ever roosted before in their life. I want them to use the roosts to help with boredom since they are locked in their run for the first half of the day while I'm at the college. My question is, will they ever pick up on the idea or is it a lost cause at this point?