I'm worming my chickens for the first time this spring and I have a few important questions first. I was able to find Safegaurd 10% paste and Piperazine dihyrochloride 53% powder. I am also 99% positive that some of the flock has gape worms. Which product would be the best to use? What dose and treatment plan would best deal with gape worms? Also what would the withdrawal period for not eating the eggs be? And would I be able to hatch the eggs I cannot eat, or would the wormer cause problems for the baby chicks?