This is our "Chicken Dog", Shiloh doing his job. Although he is actually a Shetland Sheep Dog, he does pretty well as a chicken dog. When one of the ladies escapes from the pen, Shiloh will get to work and hold the chicken until we come and pick it up and toss it back into the pen. He has never attempted to harm any of them - he just chases them until they give up. He then stands over them and barks for us to come and do our part. Since the chase is what he really enjoys, if we don't come out quickly enough, he will get bored and walk away until the chicken moves - and then the game starts all over again. He has saved me a whole lot of work.
In this photo, you can see one of our blackberry plants in the foreground, another Buff Orpington watching from on top of our compost pit (in the main chicken pen), and our two "nursery pens" where we keep the young ones before mixing them in with the rest of the flock.