When should a puppy double its weight?

A puppy typically doubles its birth weight by around 7 to 14 days of age. This rapid weight gain is crucial for their growth and development, as it indicates they are nursing well and receiving adequate nutrition from their mother. After this initial doubling, puppies will continue to gain weight steadily, usually reaching about four times their birth weight by 8 weeks of age. However, growth rates can vary by breed and individual health factors.