I inherited my flock as 2-3 year olds. They lived in a mud-wallow with a couple of ducks, and have never been wormed. I have to assume that they should be pretty wormy by now, so I decided to worm them. My plan is piperazine (Wazine/Pig Swig), followed after 10 days by Eprinex. I gave them the Piperazine 2 days ago. I've been checking their droppings ever since, but have yet to see a single worm. Shouldn't there be worms in there? Did the worming not work? Is it possible they don't have worms in the first place? - seems inconceivable. I'm a little worried about giving them Eprinex in 10 days. If the piperazine didn't work, they could get a dead-worm overload and kill them.