Thanks, everyone for the well wishes, it worked!
Denny didn't mind going back to the Vet's this morning. He greeted everybody most friendly, and didn't even look back when they led him into the backroom. Very different from all the others, who always made a fuss, and didn't want to be left there.
He slept through the night without any problems, except to go drink some water once. The funny thing was, when my son picked him up, and he thought Denny was still under the influence of sedation, the Vet's staff looked at him with big eyes, because they thought Denny was quite a hyper dog! He did yap a lot while there though. I'm just glad he's O.K. He doesn't know yet, but he'll be back there next Wednesday for neutering. Good thing he likes it there!
He's eager to get down to go for a swim, and romp around the back yard, and so is Happy - always!
I wish you all a wonderful weekend! Ours will be filled with a lot of work, cleaning, and packing, and in between swimming, and sleeping, that's all.