Thank you all so much for your well-wishes!
Dexter is fine now… he’s hanging out under the coffee table chewing on the ginormous bone I gave him as a get well peasant. They removed the offending claw and while he was under gave him a full mani/pedi. He doesn’t have to wear a cone thing (although those things are hilarious!) which I’m thinking is a pretty good sign. So yeah – the poor guy’s pretty out of it and his little legs are all shaky (doggie drugs must be really good stuff) but he’ll be fine.
Seriously why do they even have a dew claw?