Today I stumbled upon this Etsy shop Sibling Rivalrie, photographer Winnie Au who has snapped dozens of great photos of just that subject matter. The Etsy shop Sibling Rivalrie is a business owned by 3 sisters living in 3 separate cities. Winnie is the youngest and based out of New York City. She specializes in photographing dogs, capturing their inscrutable moods on film and immortalizing their creature curiosity for humans to ponder. If you'd like to purchase any of this photographs, feel free to check out their shop.
Here are a few of my favorites:
Photos by Winnie Au, for sale through Sibling Rivalrie on Etsy.com