Hello. I am getting super frustrated, and I don't know what to do from here. My chickens keep getting tapeworms. I have treated them with Valbazen, and followed the recommended schedule. It DOES kill the worms very effectively, but the wild bird population on my property keeps bringing the worms back. I have tried the natural preventatives (Herbal wormer, DE, etc.), and they help a little bit... but the chickens get so infested that it isn't enough. I wormed them in October, but at least one of my hens is infested again. I love having chickens, but if this is going to be an ongoing battle, I don't know if I can have them. What would you do in this situation?