ARISTOPET - Poultry Wormer (125ml) is essential for bird owners as birds and poultry are at risk of catching worms at some point throughout their lives and therefore it is important to worm your birds regularly. Aristopet Poultry Wormer treats and prevents roundworms,caecal worms, and hairworms in chickens, ducks, geese, turkeys and other poultry birds.