Peanut Head read on the internet that chickens need to be trained to lay their eggs in the nesting boxes and not where they poop. Which is, obviously, everywhere. So, apparently golf balls are going to trick them into not pooping in their nesting boxes.
They will help a laying hen feel safe and relaxed while she is sitting, and calm a broody hen, as well as repel rodents, flies and other parasites. Broodies have a tendency to get mites and other bugs since they dont get out to dust bathe often, if at all, and the warm, dark space underneath them is a breeding ground for parasites. The herbs safely and naturally avoid that.