Photogenic dog in the first photos, but the background ruins them for me, far too distracting.
bottoms one seems a bit soft And also look to be fading inot the background a wee bit?
I love the pose on number 3 but the harsh shadows ruin the actual shot. I think if you could do that again with out them would be great picture. I just want to say your old boxer is adorable. How old is he/she. Much more of a bigger dog fan than the little ones.