It is sad seeing them grow up, but it's also wonderful!

They don't need constant supervision.
They don't chew up everything in sight.
They don't bite like they did with those razor sharp puppy teeth.
You can take them so many more places than you could when they were puppies.
No more up to go out at 2 am...then again at 4 am

There are so many more reason I could list.

But I'll never miss those puppy days either