Though my curiosity got the better of me and decided to sneak up on this strange puppy. His name is Peter.
TURNS OUT HE'S NOT A PUPPY AT ALL!
He seemed nice enough even though he didn't really play with me. He did let me come up to sniff him. He didn't seem to mind, and he even let me stick my big nose right into his fur.
A little poke here, a little poke there, he would occasionally move around as he munched on leaves, and leave little treats each time I poked him a little.
Voila! My own Pez dispenser!
I sure hope Peter comes to the dog run again soon.