Dr. Kenneth E. Anderson

I. INTRODUCTIONConsumer demand for organic and free-range poultry products is driving the commercial egg industry away from conventional housing systems towards free-range housing systems that allow birds access to the outdoors. Whilst these systems are considered higher welfare, they also carry more health risks that can impact the intestinal health of the bird, such as greater exposure to parasi ...

I. INTRODUCTION The transition in the layer industry from conventional cages to cage-free and even further into free-range production is rewriting the nutritional requirements of the laying hen. In the last 25 years, the number of eggs a hen can produce has increased by about 2 eggs each year while the amount of feed required to produce these eggs has been reduced by 18.6% in cages (Anderson, 1991 ...