I noticed that my hen who just hatched a brood of 11 chicks is pooping roundworms. So I go to the feed store, and they give me a bottle of Wazine 17, the active ingredient is "Piperazine Base" The only directions are printed on the bottle, and they are a little vauge: "Worming every 30 days is necessary to break the large roundworm life cycle." Ok, I figured more than one dose would be needed, but it doesn't say how many. Should I give it to them only twice? For a few months? Or do they have to take it forever?? Also, the warning reads: "Do not use in chickens producing eggs for human consuption." Does this mean WHILE they are on the medicine? And for how long afterwards? Or does it mean I can NEVER eat the eggs from those chickens??