In this chapter, the theory and evidence from experimental and commercial populations which give some guide on the maintenance of genetic variation in poultry is discussed. Highlights focus on how accuracy in selection and rates of improvement in all traits can be increased best to utilize this...

This chapter describes the intensive farming practices applied to broiler chickens in the USA and UK. Focus is given on the advantages (economic) and disadvantages (animal welfare and increased risk of disease spread) of the housing and feeding conditions in this farming system.

Legislative and assurance scheme requirements for standard and alternative indoor and outdoor broiler and turkey production systems are described. Generally, health and welfare are protected to various extents by a series of input requirements, largely related to stocking density, light,...