Today I found a 3" roundworm on the butt-fluff of one of my hens, and another one in a watery poop on the ground below her. Other than that, she & everyone else is looking/acting/eating/drinking/laying/pooping just fine. Okay, now what? I have a large flock of layers who must sell their eggs to pay for their feed. So I don't want to dose everyone with Wazine, though it's affordable, available, and I already own a bottle. Because after dosing with Wazine I'll have to discard the eggs for a while, I think the withdrawal period is a week. I know there's Verm-X which has no withdrawal period, but my hens cannot afford it. I have some food-grade DE which I don't use all the time, just when it seems to be needed. Like now. I added some to all the feeders. I also put some raw ACV in all the waterers (except the metal ones) and made plastic dishes of ACV-treated water available in those pens. What else could I give them that would help rid them of worms? Canned pumpkin? Pumpkin seeds? Cayenne pepper? And how concerned need I be about their possible roundworm content? Since they free-range, aren't they exposed to them in all the things they peck at & scratch up? Need I worry unless they start to look/act scrawny or lethargic? If I must treat with Wazine, I'll treat half of the flock at a time. They are divided between two pens, so I could treat one & discard just their eggs, but still have at least half of their eggs that would be good for sale/eating. Then after a week or so I could treat the other half. From searching the site on this topic, I could see where there are a variety of opinions on causes & treatments. I'm not trying to open a big can of worms, so to speak, but just looking for some help in deciding what to do for my flock. I appreciate all your input, thank you.