How long does it take a Great Dane to get to full adult size?

Answer by  Zaka (2315)

Just under a year. This is a bit longer than for other breeds as they are unusually large animals. The rate of growth, however, will depend on the amount and quality of nutrition they recieve as well as physical activity. No exercise will stunt their growth.

Answer by  smellycat22 (1129)

Great Danes grows the most the 1st year gaining 90 to 140 pounds. They will continue to fill-out to reach their adult size by 2nd or 3rd years.