Genetics and Animal Welfare [chapter]

Temple Grandin, Mark J. Deesing
2014 Genetics and the Behavior of Domestic Animals  
Animals genetically selected for rapid weight gain or production of large quantities of milk, eggs, or meat require a tremendous appetite and food intake in order to generate large amounts of these products. Selection for rapid increases in muscle mass is highly correlated with selection for increased appetite drive. Research on chickens shows that birds selected for egg production stop eating when their metabolic needs are met, but broiler chicken selected for meat production do not stop
more » ... n do not stop eating until their gut is completely full (Nir et al., 1978) . NERVOUS SYSTEM ABNORMALITIES
doi:10.1016/b978-0-12-394586-0.00012-3 fatcat:q3fctvjnefepxinoclmjlyaxjy