 I do have my dog with me and he is chewing something in the background. Christine Nicoll is a professor of animal welfare at the Royal Veterinary College in London. Her dog is called Pogus. I hope he doesn't distract everyone too much. My concern for my chickens' welfare is partly because I've become genuinely fond of them and partly because caring for my future dinner is making me give this much more thought than when I buy chicken in a shop. What does make a chicken happy?