Seems like this could use a levels or curves adjustment. What I mean is that the tones seem off to me. I also would have prefered a looser crop at the bottom. I like the pose of the dog and the way the guns are arranged behind the dog.
If I may make a suggestion, it would be to either include the feet of your subject next time or frame it more tightly, like around the waist so the cut off feet don“t look so accidental :)
I thought about doing dogs of war, but didn't have any war paraphenalia laying around :) I don't love the color palate here, I think less yellow would have been better. A blank wall might have been better than the curtains as a backdrop, too. Also, I know dogs are hard to control, but I would have liked to see him looking at the camera.