I have 3 khakis who are 3yrs old and 3 runners who are 9 wks old. They've been together for about a week but the runners show no interest in following the older ducks leads. I was hoping they would flock with the older ducks and learn the free ranging routine from them. So far no interest in leaving the run let alone being with the older ducks. The runners have walked over to the open gate several times then headed straight back to their comfort zone around their shelter.