The gestation period for dogs, also known as pregnancy in dogs, normally ranges from 57-65 days, with an average of 63 days. However, the exact length of pregnancy can vary by several days, and it can be hard to predict the length of pregnancy without the assistance of a veterinarian. The length of pregnancy is important for the health of the pregnant dog and the puppies and is used to monitor nutrition and veterinary care during pregnancy.

It is recommended to record the exact date of mating if there is a planned breeding. If there are two matings, note the dates and expect birth to occur between 63 and 65 days later. During the first two-thirds of pregnancy, food intake should remain the same, and it is important to feed the dog a premium, high-quality diet approved by a veterinarian during pregnancy. Nutritional supplements and vitamins should be discussed with a veterinarian before giving them to the dog. During the last three weeks of pregnancy, the dogs food intake should increase by up to one and a half times the normal level by feeding smaller meals more frequently to support the dogs health and body condition while she is in the final stages of pregnancy and producing milk after whelping.