Right before our trip to the desert a month or so ago, mom got a Doodie pack for Torrey to carry. She wanted some way for her to be able to carry enough water for her and I to drink. So, guess what, Torrey is now my water carrying slave. He-He Actually, Torrey doesn’t mind the pack at all. The very first time she kind of wondered, what the hey, but now she doesn’t care. Kristen, who is the owner, founder, guru of Doodie pack was great to help us out. Torrey is in between a medium and a large, so Kristen adjusted the straps on a pack and sent us that. It fits great. The pack carries two water bottles, one on each side for balance, and a fold up water bowl. The original idea of the Doodie Pack is to carry, you guessed it, Dog doo-doo. And it works great for that too. The pack is light weight and not big and cumbersome like some we looked at. For a medium size dog, these are perfect. You can contact Doodie Pack at www.doodiepack.com . Tell them Roxy the traveling dog highly recommends them. Now go have fun in the great outdoors.