The shelter did not spay Star last Monday, though they claim they did.
There is a scar that appears to be from spaying. But it's a very old scar.
I took Star to the vet because, frankly, I didn't see any sutures and I thought I was going crazy. I wanted the vet to give me some answers. And the vet agrees, so I'm not crazy (about this, anyway)--my dog sure didn't get spayed a week ago.
I'm a little annoyed because the shelter literally went through the entire song-and-dance about spaying. They held my dog for three days in order to "spay" her. And when we picked her up, they showed us that "the sutures aren't inflamed, the incision site is very clean." (I took their word for it at the time; Star was wiggling all over like a crazed worm and I couldn't really see anything at all between her flailing legs.) And they warned us not to give her a bath, and keep her calm for several days.
What's worse, when we filled out the adoption paperwork, we felt sure she was already spayed. The guy helping us with the adoption forms said "Great, you can take her home today. That will free up space for more dogs!" Then he said "Oh, no, she hasn't been spayed, so you have to wait to take her home." The waiting was not a big deal--if they had actually spayed her. But they didn't. And what is implied by the guy's statement is that, because Star had to stay and take up a run for an additional three days, that meant some other dog got euth'd because there wasn't enough space.
Nice. Not that there's anything I can do about it now. I did gratefully give her a bath, though. She seemed happy to be clean and did a bunny hop across our lawn afterwards.