I've posted photos of my two rescue mutts before. I started agility with the second one, Finagle, because she was so incredibly soft that she could barely function from the terror of daily life. Agility has been wonderful for her.
So, I started my 10 year old extremely fear aggressive mutt in agility. He's 20 lbs and has 3" long legs - a body not made for agility.
But, he loves it! He gets along with the people and dogs in class and just enjoys life!


and this is him hanging out waiting for his next turn to run the course