Which part? The withdrawal? Did you know that in Canada and other countries there is no withdrawal for Wazine when used in egg laying chickens? With the exception of a few drugs, all FDA approved human and animal medications can be used in laying hens. It's up to you and your vet to come up with a withdrawal plan.Wow! You are still promoting Wazine after what the article YOU posted said!? The article I posted has a lot of good information on worming chickens, pumpkin seeds is only one thing...take it or leave it, just sharing.