Hi Donald,
On the technical front, two things I would do are;
Slight anticlockwise rotation
Clone out the bright white dot in the sea near horizon on right hand side (it is just a bit too bright to ignore)
However, I am being really picky mentioning either, but I know you'd rather I did, than keep quiet.
My thoughts are apparently in line with other views expressed above regarding this image.
Now to the merits of this shot vs the human one; 'Alone', which I also think works better, due to the human's posture, we can imagine so much more, amongst other differences (e.g. Manfred's discussion of the camera's viewpoint).
I agree with the view that in seeing such an image; the dog is clearly following, or returning to, its owner*, who is out of shot.
Now if it had been sitting or lying, looking forlornly out to sea, then it might have struck the 'loneliness' chord in me.
* This thought is possibly pre-conceived by me because it has been shot in UK; where feral dogs are very uncommon, in other countries, I gather it is far from rare to see dogs out 'on their own'.
Hope that helps, Dave