My 9 mo. old Buff Orpingtons are molting, which means I we are getting about 1 egg per week. I was thinking that this might be a good time to worm them since we aren't getting many eggs anyway and would have to throw the eggs out. Is it safe to worm while they are molting or would that stress them too much? And what is the best wormer? I've read that Ivomec is good, but I have no idea how to dose chickens with it.