Intestinal worms can risk the health of caged and aviary ornamental birds. Worms can be spread while the bird forages through its cage. Grown parasites leach vital nutrition from birds and can cause elevated health problems. Birds with parasitic infections may appear listless, fluffed up and may rapidly lose weight. Veterinarians and bird experts agree that Threadworms, Caecal Worms, Gape Worm, Roundworm, Gizzard Worm and Tape Worms are detrimental to birds. Use a properly formulated liquid for your caged and aviary ornamental birds. NOT FOR USE IN FOOD PRODUCING SPECIES.