There's always the chance you could be sensitive to the wormer. Also, some wormers can be given to people, some not. I've never used piperazine so never looked it up; if it is not used in people, I would toss the eggs. I did use Eprinex and did not toss any eggs because I know it is used in people.
If you choose to chance it, at least don't sell or give the eggs away; you wouldn't want to chance that.
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Do you really wanna eat eggs after observing worms being excreted after worming? Wormers arnt designed to harm the chicken unless you severely overdose them, which could harm them internally or kill them. Wormers are designed to paralyze or kill worms if correctly dosed. Wormers are poisons. The eggs will have the poison in them however so slight. Like ddawn stated, it's possible an individual could be sensitive to the wormer and possibly have a reaction. Wazine (piperazine) is no exception...with wazine, if your chickens are for slaughter, there's a 14 day withdrawal period before you can eat the chicken. If you can eat the chicken after the 14th day, then it's safe to eat the eggs as well. It's your choice. I'll wait 14 days. Wazine and many other wormers have been given to humans for treatment...under a doctors prescribed directions and observation.
Okay, thanks for the replies. I'd like to know what others have to say about it. Anyway, I only do preventive worming, I haven't seen any worms nor do I suspect worms. But knowing what they eat off the ground, worms are likely. Also, knowing what they eat off the ground, it may be a reason in itself not to eat eggs!
Piperazine is used in humans to treat round worms and pin worms. Theoretically, it shouldn't harm you unless you are allergic/react adversely to it. I am of the mindset that you shouldn't take unnecessary drugs, so I wouldn't eat eggs contaminated by piperazine; nor would I give them to my family, friends and neighbors. If you are not of the same mindset then feel free to eat the eggs.
I usually worm around the middle of October. I use Valbazen and I suppose I worm myself because I eat their eggs.... and give some to the dog to worm him too.
Mahonri, I emailed my local farm extension (Clemson) to see what they say. Haven't heard back yet. I know the eggs can't hurt you but I guess it's just the idea of it and the fact that they labels say not to eat them. But my chickens come out the winner when I don't eat them. I always boil any eggs I don't eat and chop them up and give them to the chickens. They mob me when I do that!
I got my bottle of Ivermectin and today I used it on some of my chickens with mites. I understand that it also gets the roundworms. If that's true, I'll just stop using piperazine. Anybody use Ivermectin Eprinex to control worms AND mites?
OK from what I understand you can't feed the eggs because you are still feeding the wormer to the chickens????? It just makes it longer you can't eat the eggs. You can give to the dogs and /or cats and they are wormed also......but you need to cut the wormer off to the chickens......?