I treated my chickens with piperazine a month ago after having one of my hens expelled a load of adult roundworms. They seemed to be doing great. Maybe this is naive, but I put them on verm-x because I was trying to avoid chemicals, but today the one who was sick before (that had gotten better) is acting sick again, and I was able to see a poop that had small, maybe 1/8 inch long worms moving around in them. I just put some piperazine in the water again, but I'm concerned they wont really get enough of it. Can I feed them the paste stuff? I am throwing in the towel with the herbal stuff right now. I want my girls to get better...I hope I'm not too late. I can run to a store now, I just need to make sure I get exactly what I need!