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The breed of the horse is sometimes secondary when breeding for a sport horse, but some disciplines may prefer a certain breed or a specific phenotype of horse. Sometimes, purebred bloodlines are an absolute requirement: For example, most racehorses in the world must be recorded with a breed registry in order to race.
More developed infants will typically require a longer gestation period. Altricial mammals needs less time to gestate compare to the precocial (well-developed neonate) mammal. A typical precocial mammal has a gestation period almost four times longer than a typical altricial mammal of the same body size. [20]
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 ...
The duration of this period varies between species. For most species, the amount a fetus grows before birth determines the length of the gestation period. Smaller species normally have a shorter gestation period than larger animals. [2] For example, a cat's gestation normally takes 58–65 days while an elephant's takes nearly 2 years (21 ...
From time of weaning until the puppy reaches 40% of the adult body weight, the optimal energy intake per unit body weight is twice that of an adult dog of the same breed. [7] From 40% to 80% of adult body weight, energy requirements decrease to 1.6 times the adult requirement, and from 80% to the end of growth, this decreases further to 1.2 ...
A puppy is a juvenile dog, generally one less than 12-18 months old. Puppies are markedly underdeveloped and dependent on their mothers at birth (displaying altriciality), but healthy puppies grow quickly and begin walking thereafter. Puppies generally weigh 8–16 oz (0.23–0.45 kg) shortly after birth, depending on the breed. [1]
A newborn foal A foal will be able to run alongside of its dam within a few hours of birth.. Foals are born after a gestation period of approximately 11 months. [1] Birth takes place quickly, consistent with the status of a horse as a prey animal, and more often at night than during the day.
A female dog is usually diestrous (goes into heat typically twice per year), although some breeds typically have one or three cycles per year. The proestrus is relatively long at 5 to 9 days, while the estrus may last 4 to 13 days, with a diestrus of 60 days followed by about 90 to 150 days of anestrus.