Meet Klaus, a Bernese Mountain dog puppy. He has been growing like wildfire. The first picture was taken at 9 weeks and he was 25 pounds. 
The second picture was taken at 12 weeks and he was 32 pounds. 
The last picture was taken at 21 weeks and he is 71 pounds.
He has gone from cute and cuddly to giant and handsome. 
Be advised: This is what happens when you feed your puppy well.