Maybe you could come and blow your dog recall at my unruly hens, Cameron?
Mine have a couple of acres to roam in, they are all free range. But some of them go out on to the farm track and scratch at the grass verges, and even on the lane itself, with cars going by. I have seen them in next doors garden, and even way up the lane at times. But they always return at dusk to go in.
Where my ponies are kept, the hens there walk over a 10 acre field. One of my young cockerels is with them, and you can see him leading his ladies over the fields. Before I gave the cockerel to the land owner, the hens would go off down the village and were right by a busy road when we found them one day, but the cockerel does keep them in a check a little bit now. Another day, I looked up the hillside, and they had walked up the track, gone in a neighbours field, and were right on the skyline, having walked up a 7 acre hill field!! Again they returned to go in to their shed at night.
This proves hens have a homing instinct!!