Hey all! I've been reading the bazillions of threads on here about de-wormers. I even stumbled across a few that suggested a de-worming chart. Since I haven't found one on the site I thought I would link to this: http://www.thepoultrysite.com/articles/439/treatment-of-intestinal-worms-in-broiler-breeders I'm assuming this info also goes for layers and not just broilers. Sorry if this has already been posted, but I found it helpful. It even has an explanation for dosage.