I was out on sales calls this monrning with my mgr and we came up to what looked like an accident. Well it wasn't. It was a dog that got hit

I just can't get it out of my mind! He was sitting up but his hind quarters were dragging. I held back crying so bad. A cable truck was backing up to get him.
He was sitting up....so I need someone to tell me thats a good sign and he'll be ok ??? Oh it was heartbreaking.