Hi Caitlin! Just wanted to say I love your pictures! And I like the middle one the best. The first one feels too close and the third one feels too spacious – the middle one feels just right. Just my opinion.
I think the other reason that one is my favorite is you can actually see the dog’s head. In the first one my attention was initially drawn to its tail; the third one is better as far as that goes, but still not as good as the middle one. And the position of your brother’s foot is great in that one too. I bet he didn’t know he was such a natural at modeling 😛