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As of 2011, pigs used commercially in the UK and Europe had an FCR, calculated using weight gain, of about 1 as piglets and ending about 3 at time of slaughter. [5] As of 2012 [update] in Australia and using dressed weight for the output, a FCR calculated using weight of dressed meat of 4.5 was fair, 4.0 was considered "good", and 3.8, "very good".
Pigs were originally bred to rapidly gain weight and backfat in the late 1980s. In a more fat-conscious modern day America, pigs are now being bred to have less back fat and produce more offspring, which pushes the sow's body too far and is deemed one of the causes of the current prolapse epidemic.
The Chester White is the most durable of the white breeds; it can gain as much as 1.36 pounds (0.62 kg) a day and gain 1 pound (0.45 kg) for every 3 pounds (1.4 kg) of grain it is fed. Their pale color leaves Chester Whites prone to sunburn; they must be given access to shade in the summer.
Ractopamine is known to increase the rate of weight gain, improve feed efficiency, and increase carcass leanness in finishing swine. Its use in finishing swine yields about 3 kg (6.6 lb) of additional lean pork per animal, and improves feed efficiency by 10%. [14]
[121] [122] In English indoor farming, young pigs (less than 110kg in weight) are allowed to be kept with less than one square meter of space per pig. [ 123 ] Pigs often begin life in a farrowing or gestation crate , which is a small pen with a central cage, designed to allow the piglets to feed from their mother while preventing her from ...
The offspring of Australian Yorkshire pigs have proven to obtain higher rates of daily mass gain, feed conversion and level of back-fat thickness than local Vietnamese breeds. [ 23 ] The Binh Thang Centre in Vietnam has produced soft tissue composition results from the carcass dissection of Australian Yorkshire pigs, stating the breed is 56% ...
The pigs are characterized by their red coat and distinctive wattles. They typically weigh 800–1,000 lb (360–450 kg). Large specimens can reach 1,200 lb (540 kg) in weight, 4 ft (120 cm) in height and 8 ft (240 cm) in length. They normally have 7 to 12 piglets per litter. [1]
The true African Guinea hogs are a large, red breed with upright ears, bristly hair and long tails, suggesting genetic influence of the Nigerian black or Ashanti pig. [8] They were brought to America on slave ships. Around 1804, Thomas Jefferson acquired some of these pigs, which had arrived from Africa via the Canary Isles. The original strain ...