Small-breed dogs tend to have higher metabolism rates than their larger counterparts, which means they need a puppy feeding diet specifically designed for them. 'Small-breed dog food formulas are created to give your dog the right balance of nutrients,' says Debra Eldredge, DVM, a veterinarian in upstate New York and coauthor of The Dog Owner's Home Veterinary Handbook (Howell House). Here's what you need to know to feed your small-breed pooch.
The guidelines on the package are a great starting point, Eldredge says, but 'you have to customize [them] for your dog.' For instance, her family has three dogs who all weigh almost the same. But, one is getting twice as much food as the other two, and she's thin. 'She just burns it up,' Eldredge says. Your dog's breed and activity levels will affect how much food she needs.
Small-breed puppies, especially toy breeds, can be prone to hypoglycemia. To keep your dog’s blood sugar levels up, you might have to feed her more frequently and up the calories, Eldredge says.
Small-breed puppies grow quickly, so during the first six months, they need to eat more food and eat more frequently, generally three to four times a day. After six months, feeding two meals a day is usually sufficient. As your dog gets older and less active, her nutritional needs change, and she may need a formula for mature dogs. Her new food will generally have more protein and fewer calories.
Smaller dogs have smaller mouths and teeth, so their food is usually made in a smaller bite size, which is easier for them to chew and swallow.
Don't leave your dog's food out all day. Instead, pick it up after 10 or 20 minutes, Eldredge says. If food is available all day, she may eat out of boredom.
With dog food, your pet is on a balanced diet. Feeding her human food may throw off that balance. The occasional taste of chicken or eggs is okay, but don't make it a daily habit.
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.