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As of 2011 in the US, broiler chickens has an FCR of 1.6 based on body weight gain, and mature in 39 days. [25] At around the same time the FCR based on weight gain for broilers in Brazil was 1.8. [25] The global average in 2013 is around 2.0 for weight gain (live weight) and 2.8 for slaughtered meat (carcass weight). [26]
It is used primarily with spring-born calves, as pasture quality at this time is declining, preventing the calf from finding the other 50% of its nutritive needs by grazing. [1] [3] A calf requires approximately 10% of its body weight in milk daily; for a 100 lb (45 kg) calf, this means 10 pounds (4.5 kg) of milk. [1]
Live weight gain for the Limousins averaged 1.27 kg/day, compared with an average 1.29 kg/day for the British breeds and 1.38 kg/day for the other continental European cattle. Limousin saleable meat gain averaged 585g/day, with the balance being 687g/day of low value or waste product, such as bone, trimmed fat, internal organs, and hide.
On average, cattle will consume 1.4 to 4% of their body weight daily. [8] There is a range of types of feed available for these animals. The standard text in the United States, Nutrient Requirements of Beef Cattle, has been through eight editions over at least seventy years. [9]
The cattle industry takes the position that the use of growth hormones allows plentiful meats to be sold for affordable prices. [24] Using hormones in beef cattle costs $1.50 and adds between 40 and 50 lb (18 and 23 kg) to the weight of a steer at slaughter, for a return of at least $25. [25]
In addition, a newborn double-muscled calf's birth weight is significantly greater than that of a normal calf. [6] Belgian Blue cattle have improved feed conversion ratio (FCR) due to lower feed intake compared to weight gain [6] due to an altered composition of body weight gain which includes increased protein and decreased fat deposition. [6]
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The United States grades feeder cattle that have not reached an age of 36 months on three factors: frame size, thickness, and thriftiness. [7]Frame size evaluates feeder cattle' height and body length as determined by their skeletal size in relation with their age; frame size affects the animals' mature size and weight gain composition as they are fed into fed cattle.