Just let it heal to see what happens to it. But i think your dog is just fine. It will take a couple days to a week for his soreness to go away
He felt nervous this is his dream job he don’t want to miss it up just like all of us we get happy when we get something we been wanting but nervous never knowing what would happen would it turn out good or bad
The answer is B. Endorphins.
The first it’s usually a paid job to gain experience for school