1. Does a poopy butt always mean worms? 2. What do you use to worm laying hens? 3. How often and what is the with drawl period? 4. What would happen if we actually did eat the eggs after they had been wormed? **** vet put my girls on a 6 week pyrantal regimen, and it has a 4 week with drawl period. I am tossing a dozen eggs or more every 3 days. This is ridiculous. And some of the chickens still have dirty bottoms, so this may not even be doing the trick.