Sid, you can get piperazine at the pet shop. As with most chook wormers , it only treats for round worm( ascaridia Galli ). It's a fairly easy procedure . Add it to the water, making sure that it is their only water source. You need to repeat it again in 10 days. I use piperazine and then alternate with panacur ( fenbendazole ) goat wormer. The panacur is easy for me cause I have it on hand for my goats, and it kills all worms including tape.