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Hairless guinea pigs are not significantly physiologically different than regular haired guinea pigs, [4] although they need to eat more to maintain body heat. The optimal temperature range for a hairless guinea pig is 75 to 79 °F (24 to 26 °C), which is slightly higher than the optimal temperature range for the haired guinea pig. [5]
In horses, the lower critical temperature is 5 °C while the upper critical temperature depends on the definition used. [11] Their thermoneutral zone is roughly 5–30 °C (41–86 °F). [12] In mice, the lower critical temperature and upper critical temperature can be the same, creating a thermoneutral point instead of a thermoneutral zone.
Normal human body temperature varies slightly from person to person and by the time of day. Consequently, each type of measurement has a range of normal temperatures. The range for normal human body temperatures, taken orally, is 36.8 ± 0.5 °C (98.2 ± 0.9 °F). [12]
Hairless skinny guinea pigs are not significantly different physiologically from regular haired guinea pigs, [4] although they need to eat more to maintain body heat. The optimal temperature range for a hairless guinea pig is 68 to 79 °F (20 to 26 °C), which is slightly higher than the optimal temperature range for the haired guinea pig. [2]
Normal body temperature is around 37°C (98.6°F), and hypothermia sets in when the core body temperature gets lower than 35 °C (95 °F). [2] Usually caused by prolonged exposure to cold temperatures, hypothermia is usually treated by methods that attempt to raise the body temperature back to a normal range.
A female dog nursing her newborn puppies. The female dog may produce colostrum, a type of milk high in nutrients and antibodies, 1–7 days before giving birth. Milk production lasts for around three months, [120] [121] and increases with litter size. [121] The dog can sometimes vomit and refuse food during child contractions. [122]
The puppy's organs and systems continue to develop and refine during this period of growth and development. It also involves the ability to control its own body temperature as well as the maturation of the senses, such as hearing and sight. The puppy is completely developed and prepared for birth by the time the fetal period is over. [6]
Adult pigs generally weigh between 140 and 300 kg (310 and 660 lb), though some breeds can exceed this range. Exceptionally, a pig called Big Bill weighed 1,157 kg (2,551 lb) and had a shoulder height of 1.5 m (4 ft 11 in). [5] Pigs possess both apocrine and eccrine sweat glands, although the latter are limited to the snout. [6]