How old can a scottish terrier be to have puppies?

A Scottish Terrier can typically start having puppies as early as 6 to 12 months of age, but it's generally recommended to wait until they are at least 2 years old for optimal health and maturity. Breeding at a younger age can pose health risks to both the mother and the puppies. It's also essential to consider the dog's overall health and temperament before breeding. Always consult with a veterinarian for guidance on responsible breeding practices.