Pregnancy and nursing are not only responsible for many changes in a dog's body, but for changes in her lifestyle as well. If your dog is pregnant or nursing, pay special attention to her changing nutritional needs as she carries, delivers and nurses her puppies.
If you're planning to breed your female dog, it’s important to assess her body condition well in advance of breeding. Because of the physical demands of pregnancy and nursing, a dog with less-than-ideal health can experience problems:
Be sure to feed the proper amounts of a complete and balanced diet. This will support the mother's healthy weight and body condition before breeding and help maintain her health and that of her babies throughout pregnancy and lactation.
The gestation period for dogs is nine weeks. Pregnant dogs gain weight only slightly until about the sixth week, and then gain weight rapidly.
The energy requirements of pregnant dogs are reflected in the pattern of weight gain. Pregnant dogs will need to consume 25% to 50% more than their normal food intake by the end of pregnancy, but energy requirements do not increase until about the sixth week.
The best diet for pregnant and nursing dogs is a high-quality, nutrient-dense pet food formulated for all life stages or for growth. Although puppy diets are generally recommended for pregnant or nursing dogs, large-breed puppy formulas may not be appropriate for this use due to their adjusted energy and mineral content.
Pregnant dogs lose weight after giving birth, but their nutritional needs increase dramatically. Depending on litter size, nursing dogs might need two to three times their normal food requirement to nourish their pups. Be sure your nursing mom has plenty of water so she can generate the milk volume she needs to feed the litter.
To help your nursing dog get enough nutrition, you can try several tactics:

By four to five weeks after birth, most puppies are showing an interest in their mother’s food. Gradually, the puppies will begin eating more solid food and nursing less. At the same time, the nursing mother will usually begin eating less. Most puppies are completely weaned around age 7 to 8 weeks. By this time, the mother's energy requirement is back to normal, and she should be eating her normal pre-pregnancy diet.
IAMS research has shown that some dog-food products are best formulated using a combination of carbohydrate sources. All IAMS dog foods are formulated precisely to meet the nutritional needs of your dog in his life stage. Such a combination offers optimal digestibility and helps maintain energy levels.
Our dog foods contain a variety of carbohydrate ingredients:
Barley: IAMS uses ground whole-grain barley that's cooked at high temperatures and finely ground in our dry dog-food formulas as part of our patented carbohydrate blend.
Corn: IAMS uses high-quality corn kernels that have been finely ground to break up the outside covering of each kernel, and then cooked at high temperatures to increase digestibility.
Grain sorghum: Also called milo, it is cracked, finely ground, and cooked before it is added to our dry dog foods. It is another carbohydrate source in our patented carbohydrate blend.
Rice flour: Our foods contain small kernels of white rice that have been separated from the larger kernels of milled rice, ground, and cooked at high temperatures to optimize digestibility.
Wheat: This is another high-quality carbohydrate source. In our biscuits, the wheat is an excellent, palatable carbohydrate source and adds a firm texture to the biscuit during the baking process.
Highly digestible diets are an important factor in the well-being of your dog. They deliver more essential nutrients more efficiently, so there is less waste.
Innovative and patented research by IAMS scientists has found that when the complex-carbohydrate sources grain sorghum and barley are used in a dog's diet, their breakdown is enhanced at another level.
These carbohydrate sources are all highly digestible, meaning your dog's body will still metabolize a high percentage of each for energy. What's unique about these grains is that they break down slowly and evenly, providing a stable source of energy.
The slow, even breakdown of grain sorghum, corn, and barley results in moderate, stable blood glucose levels after a meal. By minimizing swings in blood glucose, diets containing such a blend supply sustained energy. IAMS holds a patent on using grain sorghum and barley in a blend for dogs.