Because puppies and kittens have no shivering reflex for the first 6 days of life, an external heat source is necessary. The dam is the best source for this warmth. After 6 days, the puppies and kittens are able to shiver, but they are still very susceptible to chilling. Keeping the environment warm and free from drafts is of utmost importance during the first few weeks of life to prevent hypothermia. It is recommended that the environmental temperature be kept at 70 degrees Farenheit during this period, assuming the dam is providing an adequate amount of warmth and protection to the newborns.
Newborns should be weighed daily during the first 2 weeks and then every 3 to 4 days until weaning. A helpful guideline is for puppies to gain between 1 and 2 grams (g) per day for every pound of anticipated adult weight for the first 3 to 4 weeks of life. For example, if the anticipated adult weight of a dog is 25 pounds (lbs), the puppy should be gaining between 25 and 50 g/day (0.9 to 1.8 oz). Kittens usually weigh between 90 to 110 g at birth and should gain between 50 and 100 g (1.8 to 3.5 oz) per week until they are 5 to 6 months of age.
Although there is limited information available concerning milk intake in nursing puppies and kittens, one study reported that Beagle puppies consume between 160 and 175 g of milk per day. Naturally, puppies of larger breeds are expected to consume a greater volume of milk, with smaller breeds and kittens consuming less volume. Similarly, the volume of milk that a bitch produces varies with her size. German Shepherds produce about 900 g of milk per day in early lactation, with increases to a level of up to 1700 g/day during peak lactation. In contrast, a much smaller breed, the Dachshund, produces between 100 and 180 g/day in early lactation.
Other influences upon
the volume of milk produced are litter size, age at
which supplemental food is introduced, and age of
weaning. In healthy puppies and kittens, the dam's milk
supports normal growth until puppies and kittens are
approximately 4 weeks old. Supplemental feeding with
commercial milk replacer should only be necessary with
unusually large litters. After 4 weeks, milk alone no
longer provides adequate calories or nutrients for
continued normal development. At approximately the same
time, puppies and kittens become increasingly interested
in their environment and begin to spend more time awake
and playing with each other. The time at which the dam's
milk is no longer solely able to meet the nutrient needs
of the offspring corresponds to the time at which the
young are becoming more interested in trying new foods.
Source:
Virtual Veterinary. Article Source:
http://EzineArticles.com/?expert=Rich_Masters

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