Nice shot! You do have to clean your sensor though. And if the images had been shot 1/100s earlier, you would probably have the entire dog in the frame and maybe also sharp focus on his head. And if, on top of that, the car had been removed, it would have been really outstanding!
After all that good advice, I must say the moment I looked at this image it reminded me of the "Hired Wolf" Image by Jose Luis Rodriguez.
Such a pity regards the end of the story because I still find it one of those Classically Beautiful Images.
Half way to Nothing's image just goes to show how you can get a Dog/Wolf to perform, nice Dog as well.
I agree about Rodriquez. That´s one of those you wish was for real
On this specific image though, If I could get my dog to do that jump repeatedly, I would spend a lot of time trying to capture it. Clean up the background a bit (the car) and maybe have a little more distance to the gate also. That would allow the whole dog to be included and could give the picture that extra touch of balance. Could be that you cropped it for a good reason though. But the chosen focal length looks great and the dog´s posture in the air is outstanding.
5DIII, 1DX, 8-15/4L, 16-35 f4L IS, 24-70/2.8L II, 70-200/2.8L IS II, 70-300/4-5.6L IS, 200-400/4L IS 1.4x, Zeiss 15/2.8, 17/4L TS-E, Zeiss 21/2.8, 24/3.5L TS-E II, Zeiss 35/1.4, Zeiss Otus 55/1.4, Zeiss Otus 85/1.4, 100/2.8L IS Macro, Zeiss 135/2, 600/4L IS II