Wazine (piperazine) only gets rid of large roundworms. Chickens get many other types of worms, this is why you should use a broad spectrum wormer such as valbazen or safeguard. Either of these wormers can be purchased online from Jefferslivestock.com or you can call them. Here's a link to wormers and what worms they kill. Notice that albendazole (valbazen) kills them all.
Safeguard (fenbendazole.)
http://healthybirds.umd.edu/Disease/Deworming Birds.pdf
Safeguard (fenbendazole.)
http://healthybirds.umd.edu/Disease/Deworming Birds.pdf
