Well that makes sence because the names are so similar... do you know which is better for poultry? It was a poultry supply store I was looking at that had piperazine.
Grace : I buy it cause I can also get it cheap at the feed store. I worm mine and never see any wormy disharge, so I know they have never had worms but now I treat them every spring just as a maintance measure. Yes there is a 14 day egg hold back on the Piperazine.