However, it's important to note that:
* Individual litters can vary greatly. Some Jack Russells may have as few as 1 or 2 puppies, while others might have up to 10 or more.
* The size of the litter can be influenced by various factors. These include the age and health of the mother dog, her genetics, and even environmental factors.
It's crucial to remember that responsible breeders prioritize the health and well-being of the mother dog and her puppies. They often intervene to limit litter size if necessary to ensure everyone remains healthy.