Grand Rapids Business Journal Courtesy Herbruckâs Poultry Ranch Greg Herbruck will serve a three-year term on U.S. Roundtable for Sustainable Poultry & Eggs, according to his company. Saranac-based Herbruckâs Poultry Ranch President Greg Herbruck was elected to the U.S. Roundtable for Sustainable Poultry & Eggs (US-RSPE) board of directors, which works to improve poultry and egg sustainability, the company said Monday. Herbruck will serve a three-year term as a grower representative on the board beginning in 2021. âIt is truly an honor to be elected to the US-RSPE, which aligns with Herbruckâs values and expertise of sustainability for our industry,â Herbruck said. âThere are many social and community benefits to sustainability practices, and together, we will improve our industry.â