A: Each bag of Purina Poultry feed is supported by strong research and successful trials. Before a new feed is offered to our customers, we perfect the recipe. We know our feeds work, because we feed them to our own flock. Each day, we measure feed and water intake, egg production and overall bird health. In addition, we monitor egg nutrients, shell strength and the quality of egg whites and egg yolks – all with the goal of providing the best nutrition to our flock. Our research is supported by decades of poultry studies. Chickens and other poultry have been a vital part of Purina research since 1926. In this time, we’ve conducted more than 5,700 poultry studies with the goal of delivering the best in nutrition, quality and value to help you support optimal egg nutrition and bird health.