What kind of dog? Some dogs have a strong prey drive and can never be "introduced", like mine, a boxer/retriever mix. I'm sorry, but I have no help here since my dog has to be kept away from the chickens. He has killed a brooder full of guinea keets before by busting through two propped closed doors when he knew we were otherwise occupied. I have no illusions that my dogs will ever be allowed contact with my chickens. Mine is used to them, sees them off the deck almost every day and has for the last year, but if he could go down those steps, I'd lose every one and I know it.