Garden bird feeding provides welfare benefits for many species including goldfinches, but improper feeding creates disease risks and welfare harms.
Garden bird feeding provides genuine welfare benefits including supplementary nutrition during winter scarcity, but poorly maintained feeders cause disease transmission that harms individual birds and drives population-level welfare problems. Trichomonosis spread through contaminated feeders has been a significant driver of greenfinch decline. Regular cleaning, appropriate food provision and sensible feeder placement are welfare requirements, not optional extras. The welfare benefit of feeding depends entirely on hygienic, appropriate provision.