My dog has a dark past

Scooter just got home from the vet. He had been limping for over two weeks, so that’s why we took him.
My dog is currently very, very sedated. We learned that he has an injured tricep, but also that a BB pellet has been in his shoulder for over a year! What sick person would shoot this?!
Scooter has a pretty dark backstory that no-one really knows anything about.
Scooter came to Colorado from Joplin, Missouri. We got him last summer from a foster family. The entire thing was coordinated through Rocky Mountain Lab Rescue. My family had to go through a big process to prove that we were good dog owners. We had to submit pictures of our house and yard, fill out lots of forms, etc. It was totally worth it, as Scooter is a really good dog. However, he’s survived a tornado, being shot, and an inflamed tricep! Wow.
