Mine had a harder time for the first 3 days, she just wanted to lay around, and only got up to go pee. Some just take a little longer.
On the day after the spay, she did have a couple of minutes when she acted normal. I opened the front door, which I normally wouldn't do because she is a bolter and will run the street if she gets out. I figured I didn't need to take any precautions since she was just laying around and didn't want to get up. WRONG! She bolted out the door and ran all over our cul-de-sac, in her onesie with me chasing after her. The chow chow across the street was sitting alone in his driveway (VERY unusual, I knew he lived there but had never seen him in the front yard), and she ran circles around him trying to get him to play. I finally got her and brought her back inside, where she resumed being a princess who didn't want to get up off of her throne for the next two days.