I have an egg eater in my midst. Luckily it does not happen really often but was needing to get some golf balls or fake eggs. Then I got to thnking, I have lots of smallish river rock about he size of eggs. Couln't I paint a few egg shaped ones with non toxic paint and use those? Would they hurt the chickens in any way? I don't want to pay for fake eggs if I don't have to.