Anthel three-in-one bird wormer treats intestinal worms in cage birds (roundworms, caecal worms and hair worms). Safe, ready-to-use solution, 1ml per 50 gm liveweight of birds to be added to the drinking water consumed in a 24 hour period. Infestation is via fresh green feed or contact with wild birds, so birds in outside aviaries are at particular risk from intestinal parasites. Active ingredient tetramisole 4 mg per ml.