A couple of days ago a cardinal hit our kitchen window. Val immediately ran out to see if the little guy was OK. We discovered that it was the immature cardinal that had been hanging around the bird feeder recently and he was being chased by his father or at least by a local elder cardinal. Val was able to move him and hold him until he regained consciousness. He also kept him awake so that he would not fall into a comma. It worked beautifully and a few minutes after we ended the second video, the little guy flew away into the bushes.
We have seen him the last few days at the feeder and in the backyard and he seems to be fine.
Here are the videos.