I'm with fancy on this one. I wouldn't use it. I know people that have and if it works for you then great. Luke I would throw the eggs for ten days after application to be on the safe side.
As a first time chicken owner I had no idea what to do.. So I got advice from vets and my local poultry... And trusted in them that it's ok.. I appreciate all the advice.. As it did work amazing for me I don't have a problem with it.. But thanks