I think this shot would work with the bottom two sheep cropped off, because they are in the shade instead of the warm sunshine around the trees they don't add a lot to the picture for me.
I think you needed to be closer to the sheep to make them dominate the picture more and wait for the light to shine on them (but of course by then they would have got bored with watching you - I know this as I tried it yesterday )
shouldnt that be. "what are ewe looking at?