Corser spent the morning in bed. The vet told us that until the sutures come out, he shouldn't be jumping up and down to/from the bed and couches. Because he's so accustomed to just hopping onto any piece of furniture he wants, we had to barricade everything.
We went back to the vet to get his IV removed. They said he was recovering very quickly for the type of surgery he went through. He's slowly getting back to normal (i.e. his usual demanding & stubborn self) but he's still moving pretty slowly, and still can't make it up or down stairs.
His sutures are looking good though, healing very cleanly and quickly, so he should be in good shape very soon.