Hello there. I have heard from a couple people now that they have wormed their poultry? I have never done this to our flock growing up. I am starting my flock as an adult and have just now heard about this. It makes since as I do it to my other animals (dogs, cats, equine). Please let me know your opinions... Is worming necessary? If so how often? What do you use? What is the active ingredient? Thanks in advance.