Their droppings carried diseases including avian botulism, campylobacter, e. coli, and salmonella, which posed a risk to park users, especially children, and lowered the quality of the lagoon. Dever-Tod said they also ate the wetland plants installed by the council to help improve water quality in the lagoon. “For those reasons, culling of the Canada geese is generally supported by residents.” The previous culling methods included shooting, trapping and killing the geese on-site, planting a grass species that is thought to make them sick, and taking them off-site to be killed. Council investigations found the grass species only made the birds unwell, which was inhumane, as was taking the birds off-site to cull them. Trapping and killing on-site manually was also considered cruel.