Yesterday morning, the day after the vet ordeal, she woke up just slightly better. Somewhat more alert and eating whole grain crackers. I gave her the pain medication at around 10:30 a.m. and within an hour there was a noticeable change. She was preening, alert (still more subdued than normal though), and whistling a bit more. As the day went on she seemed to get better and better. The video below shows some of her progress, taken yesterday:

Today she is almost her old self! She is running around the couch, climbing, playing a little, not sleepy, eating (still not the pellets though), whistling and more vocal, and feels heavier when I hold her! I'm so happy! She has had no medicine today, the vet had told me "as needed", so that's also a good sign. She bounced back so fast, it's amazing to me! So it looks like I will have my sweet (and naughty) little birdie back in no time!