Wow, what a difference 48 hours makes! We're happy to report that Spike is acting like nothing ever happened :) He's moving, eating, and wagging his tail!
And he's even back to going up and down stairs:
Once outside, he actually romped out in the yard.
I got Spike from the Frederick County (Maryland) Animal Shelter when I was first living in Maryland. Since then, he's relocated with me to New Jersey, Minneapolis (where we met Joe!!), then with us to Phoenix and now back to Maryland. So he has put on quite a few miles over his long puppy dog life.
And everyone who's ever met him has simply loved him. He's just a friendly, happy dog. Yay Spike!