I have 4 hens who have never free ranged ever. They have a good size run (20x8) and a decent size coop with lots of roosts that they've lived in nearly all their 18 months. Unfortunately the ground in the run is ruined and I have been wondering if I were to let them out to free range, would they know to come back? We live on an acre and I have a big garden that's gone to pot this summer so there's a lot for them to pick around in but at 18 months with having never been let out free before do you think they'll see it as a chance to escape? I should add that they're really not "pet" chickens, I never developed the relationship with them I should/could have so it's not like they follow me everywhere or even respond to treats.