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Nursing
Pregnant dogs and cats lose weight after giving birth. However, their nutritional needs increase dramatically -- energy needs can be 2 to 3 times their normal adult maintenance requirement, depending on litter size -- in order to produce the milk supply that will support the growth and nourishment of the offspring. Adequate water intake is also important for sufficient milk volume.
To ensure the nursing dog or cat is receiving enough nutrition
* feed a nutrient-dense diet (eg, performance diet, puppy or kitten food)
* without increasing the amount of food offered at a meal, increase the number of meals throughout the day
* Free-choice feed -- offer unlimited access to dry food throughout the day