Dawg53 is someone to ask, but he recommended to me to use Valbazen and so far it has worked awesome and Valbazen kills all types of worms, but he also said if you had a bad infestation of roundworms, you would use something like Wazine to kill the adults because you don't want them to clog them up. Valbazen is like a thick milk and we soaked small pieces of bread with it and fed it to each chicken, very easy to do.