Typically, a Japanese Spitz will give birth approximately 58 to 65 days after a successful mating, which is roughly about two months. It's crucial to note that breeding during a dog's first heat cycle is not recommended, as their bodies are still developing. It’s advisable to wait until the second heat cycle before considering breeding.
Japanese Spitz Pregnancy Timeline
The gestation period for a Japanese Spitz ranges from 58 to 68 days, with most giving birth around the two-month mark. Around one month into the pregnancy, you may start to notice an enlargement of the abdomen. From about 40 days onwards, a veterinarian can confirm the pregnancy and the puppies' health via ultrasound. It's important to adjust the mother's diet during pregnancy to ensure she gets proper nutrition; however, in the final stages, overfeeding should be avoided to prevent the puppies from growing excessively large which could cause birthing complications. Proper nutrition is very important during a dog’s pregnancy.

Early Signs of Pregnancy in Japanese Spitz
Often, the first signs of pregnancy in a Japanese Spitz will appear around the 4th or 5th week after breeding. One of the earliest indications is the reddening of the nipples, followed by a gradual increase in the size of the abdomen and mammary glands. Pregnancy reactions vary from dog to dog; many won’t show noticeable signs until the last three weeks, such as increased sleepiness and reduced activity. These changes signal that your Japanese Spitz is likely pregnant.
Preparing for Birth
Before labor begins, a Japanese Spitz will often display nesting behaviors, restlessness, and may begin producing milk. To be prepared, it’s recommended that around 50 days into pregnancy, you have your veterinarian do an x-ray to assess the number of puppies and if any potential birthing issues are present. This professional advice can offer peace of mind and ensure a safe delivery for both the mother and the puppies. Always seek professional veterinarian advice during your dog’s pregnancy.