Aha -- thank you, that clears quite a bit up. At 3 AM, I thought the vet was telling me he was going to give her something to stimulate gastric mobility, and on the way home, George and I were thinking that didn't sound very helpful.

Well, she's not acting drugged, so that's good. She's as mellow as she normally is after a walk. Since she had a LOT of kibble in her stomach, I'm going to guess that for whatever reason, it wasn't pushing out of her stomach well enough. But the canned food is staying down just fine. Hrm. We shall see.