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A typical precocial mammal has a gestation period almost four times longer than a typical altricial mammal of the same body size. [34] Precocial mammal species generally have greater adult body weights than altricial mammals as precocial mammals have markedly longer gestation periods than altricial mammals. [35]
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]
The horse is considered a "thin animal" (with little fat), whose weight is divided into approximately 11% bone, 50% muscle and 9% fat; [2] but a large number of factors influence its weight. Some breeds ( draft horses ) are naturally heavier than others ( ponies ), and differ in size and bone structure, so the weight range of horses is highly ...
Cattle are often "finished" here, spending the last months before their slaughter gaining weight. They are fed nutritionally dense feed, also known as "concentrate" or "filler corn", in stalls, pens and feedlots at high stocking densities in enclosures. This achieves maximal rates of liveweight gain. [3] [4]
Female cattle, also referred to as "heifers" in agriculture, will gradually enter standing estrus, or "standing heat," starting at puberty between 9 and 15 months of age. The cow estrous cycle typically lasts 21 days. [5] Standing estrus is a visual cue which signifies sexual receptivity for mounting by male cattle.
However, horses with a low body condition score lack the fat reserves for strenuous work and also may lack lean muscle. [10] Horses with a very high body condition score carry too much weight, which interferes with stamina and biomechanics. Some studies addressed the relationship of body condition score and endurance performance in endurance races.
Holstein cattle, Friesian cattle ... farming: Traits; Weight: 680–770 kg (1,500–1,700 lb) ... and 24 months of age and 80% of adult body weight. The gestation ...
Grass is a natural source of nutrition for a horse. Equine nutrition is the feeding of horses, ponies, mules, donkeys, and other equines. Correct and balanced nutrition is a critical component of proper horse care. Horses are non-ruminant herbivores of a type known as a "hindgut fermenter." Horses have only one stomach, as do humans.