The Approach Dog Backpack by Ruffwear is a dog pack suitable for day hiking and light overnight pack trips, with a passive compression system for efficient load carrying over the shoulders. It features radial cut saddlebags, integrated harness with a breathable chassis, five points of adjustment, padded handle and girth straps, vertical stash pocket, external gear loops, reflective trim, and two leash attachment points. 
It's important to not exceed 25% of the dog's body weight when loading the pack and to gradually increase the weight as the dog gets accustomed to wearing it.