The only time I've seen our dogs hunch is when they either have a belly ache or they've wrenched their back. If he's eating, drinking and eliminating on a normal schedule, I wonder if he hurt his neck or his back? Did the vet check for tenderness along the spine?
Glad the test results were good so far!
"We are--each of us--dying; it's how we live in the meantime that makes the difference."
"It's not what you gather, but what you scatter that tells what kind of life you have lived!"
"Be kinder than necessary, for everyone you meet is fighting some kind of battle."