He looks fun to take walks with, especially in this neat location you found. Unfortunately, on my monitor I see some strange coloring (pink and green highlights) on Topper's fur, perhaps a post-processing change. I'd have cropped a little more off the top and left side, then ajusted horizon line so Topper doesn't look slightly tilted. good luck
What a fabulously handsome dog you have here, he screams, throw me the ball. maybe just a tad bit more cropped and seeing only one rail line would have brought the dog in a little closer.
What a beautiful dog he is! Lovely colour and detail in his fur. I think I might have cropped this shot to get the focus on the dog (and eliminate some of the white sky)......... and maybe rotated it slightly to the left.