Wazine is okay for peafowl, but most people don't use it because it only kills roundworm. There are other wormers (trade names Valbazen, SafeGuard, Ivomec, Levasole, Tramisol) that treat most or all of the 4 most common worms. The most common worms are capillaria, cecal, round and tapeworm, and these other wormers can be added to drinking water also. Should be readily available at your feed store with dosing instructions. Hope this helps.