I have never wormed my chickens and I am not sure how you can tell if they have gotten enough to take care of the worm problems. I think they have tape worms as I have seen some in the coop under some poop. My hubby thought maybe it was a earthworm that was under it but the way it dried looked like tapes. I was wondering if I should put it in the water or feed...Any information will help alot...Thanks