What's that I see...?

Today was lovely - fresh and sunny with blue sky. We went on a 'blip walk' as I wanted to try taking a nice autumn portrait of Alfred. He doesn't like being told to 'sit and wait' and although he did it when I'd found a spot I wanted for the background, he was looking very oppressed - hanging his head in misery. Not the best pose for a portrait :-(
But... whether or not he wanted to be a co-operative model, he just couldn't suppress his excitement at seeing something move in the bushes behind me... When I looked there was nothing there (visible to the human eye!), but it made for a lovely animated face in the lovely Mr Dog... :-)