Some dogs handle pain, anesthetic and fear better than others. If her dog is sore, groggy and somewhat frightened about her experience, this could very well be normal behavior.

However, I would rule out physical problems first. Look for excessive swelling, redness or drainage, as well as stitches that have ripped out. Take her temperature, and monitor how much she is drinking and urinating. It's ok if she doesn't eat for a day or two, but if she's not drinking or peeing, or has a fever, I'd get her to the vet ASAP.