What is the longest a Jack Russell can be pregnant for?

The typical gestation period for a Jack Russell Terrier, like most dogs, is around 63 days, though it can range from 58 to 68 days. If a Jack Russell is pregnant for longer than 68 days, it may indicate a problem, and veterinary attention is recommended. It's essential to monitor the dog's health throughout the pregnancy to ensure both the mother and puppies are safe.