Among the listed volunteers was Greg Munson, who later denounced the practice of oiling eggs to limit development. The neighbor of Silver Lake Park said he feels the practice is inhumane and suggested the volunteers replace eggs with ceramic substitutes instead of treating them. Widman said other members of Silver Lake Friends opted not to participate after concerns were raised, but volunteers who helped the effort voiced a desire to return. Replacement and oiling are options supported by the Humane Society of the United States and People for the Ethical Treatment of Animals. During the first day of volunteer addling, Munson and approximately 25 protesters voiced a variety of objections at Silver Lake Park, with some opposed to the oiling option and others objecting to any management effort that would reduce the number of goslings in city parks.