Choose the Kurgo G-Train Medium Nylon K9 Pet Backpack if you're going for a day hike. With this pet carrier, you can bring all the necessities. As rugged and thoughtfully engineered as the best daypacks, it comes with a padded laptop compartment, a pair of water bottle holders and an ample supply of zippered storage. It even adds a pet carrier compartment with a zip-open mesh top that rolls neatly out of the way. If you think your dog is cute now, wait until you see his little face sticking out of the G-Train, watching the scenery roll by.