Juvenile goldfinch

I found this birdie hiding behind a flowerpot on the slabbed area of the garden. It didn't fly away, but scuttled along the ground when I went too close trying to give it some sunflower hearts. I think it may have flown into a window and got a bit stunned, or maybe it was just tired.  The next time I went to look for it, it seemed to have gone, so I hope it managed to fly out of the range of cats.