Puppies at eight to 10 months old
By this time, small breed dogs will begin to tail off in their growth and have reached their adult weight, but large breeds will continue to grow more steadily. The difference in their size and pace of growth is significant: small breeds rapidly grow to 20 times their birth weight, while large breeds grow to 100 times but more slowly. From eight to nine months, the main growth for larger breeds occurs in their skeleton and organs.
Up to 18 to 24 month for your giant puppy
If you own a larger-breed puppy they will reach full maturity between 18 and 24 month. This phase will be when they complete their growth cycle by putting on the muscle of an adult dog. Expect them to bulk out and get heavier, and to start to look more like an "adult" dog with well-proportioned paws and limbs.
By knowing about these different growth stages, you can prepare yourself for what to expect as your puppy develops and feel confident you're giving them the care support and the right diet they need in their early years.