Supplementary feeding of garden birds supports wild populations through winter food shortages and breeding seasons, but must be done carefully to avoid spreading disease, attracting predators, or creating dependency.
Wild birds face significant welfare challenges from habitat loss, food shortages, weather extremes, and disease. Supplementary feeding provides genuine welfare benefits when done hygienically and appropriately. However, disease transmission through poorly maintained feeders can cause significant suffering — trichomonosis, which affects the throat, prevents affected birds from swallowing and causes a slow death. Regular feeder cleaning and monitoring for sick birds are essential welfare responsibilities for those who feed garden birds.