Can a dog change your day?

This is Bayliss. She goes by many nicknames; Bubba, Bubbaganush, Princess Greybeard and many more.
In January she turns 10 years old. We have had her since she was 12 weeks old and in that time she has brought nothing but joy to our lives. However, at her age she has slowed down quite a bit. She can't jump like she used to and her age is catching up to her. She doesn't run anymore either.....or so I thought.
Today I took Suzie and her to the local dog park. Most of the time she walk at a brisk pace next to me as I make laps around the park. Suz was up to her normal 1 1/2 year old stuff, chasing squirrels, trying to climb trees, generally acting the fool. Bayliss was next to me as usual, walking at a good pace. Then something wonderful happened, she ran. She chased after Suzie and started playing like a dog half her age. While I know this is not earth shattering news to some, to us it was a pretty big deal. Just when we thought that she would never run a full speed again, she took off.
A tear actually came to my eye watching my little girl doing things at her age she was told she couldn't. (The nice thing is they both slept all day and I got a lot of work done)
The moral of the story is this never let anything stop you from living your life to it's fullest. Not age, disabilities or any obstacle.