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The fast growth of the Cobb 500 is associated with an increased rate of various health problems. Compared to slower-growing chickens, they have a higher rate of sudden death syndrome, [12] hock burns, [13] Tibial dyschondroplasia, [14] weaker disease resistance and antibody response, [15] bone deformations, and problems with walking.
Modern commercial broilers, for example, Cornish crosses and Cornish-Rocks, [citation needed] are artificially selected and bred for large-scale, efficient meat production. They are noted for having very fast growth rates, a high feed conversion ratio, and low levels of activity. Modern commercial broilers are bred to reach a slaughter-weight ...
Broiler breeder farms raise parent stock which produce fertilized eggs. A broiler hatching egg is never sold at stores and is not meant for human consumption. [9] The males and females are separate genetic lines or breeds, so that each line can be selected for optimal traits for productivity in either females or males, rather than a single line in which a compromise is reached between female ...
From the early 1960s to 2011 in the US broiler growth rates doubled and their FCRs halved, mostly due to improvements in genetics and rapid dissemination of the improved chickens. [25] The improvement in genetics for growing meat created challenges for farmers who breed the chickens that are raised by the broiler industry, as the genetics that ...
One indication of the effect of broilers' rapid growth rate on welfare is a comparison of the usual mortality rate for standard broiler chickens (1% per week) with that for slower-growing broiler chickens (0.25% per week) and with young laying hens (0.14% per week); the mortality rate of the fast-growing broilers is seven times the rate of ...
Poultry workers experience substantially higher rates of illness and injury than manufacturing workers do on average. For 2013, there were an estimated 1.59 cases of occupation-related illness per 100 full-time U.S. meat and poultry workers, compared to 0.36 for manufacturing workers overall. [ 100 ]
Global meat production has increased rapidly over the past 50 years. According to Our World in Data, meat production has more than quintupled since 1961, reaching around 361 million tonnes in 2022. [1] The most popular meat globally is poultry, followed by pork, beef and mutton. Over 90 billion animals are slaughtered each year for meat. [2]
Seventeen total states are sampled every 5–6 years per livestock type, with the most recent surveys distributed to broiler farmers in 2006 and 2011. There was one question about utilization of antibiotics in poultry food or water, excluding use for illness treatment.