John Grogan, author of Marley & Me, was featured. Their new lab killed two of their chickens (one was a Polish named Liberace ) and they called Cesar in to help with the dog's prey drive. It was interesting to watch Cesar "condition" the dog by exposing her repeatedly to a chicken and making corrections when the dog keyed on it. Very similar to the way I conditioned my cats to leave our cockatiel alone. Repeated exposure; negative reinforcement when they went after the bird; positive reinforcement when they didn't. Even the most persistent of the cats now ignores the bird, who sits outside of its cage throughout the day with no threat from the cats. I hope this same approach will work for my dogs when we get our chickens Has it worked for you?