My chihuahua and I received this Kurgo backpack a few months ago and we love it. She is 12yrs old and very healthy but sometimes conditions are not conducive to walking for her. She eagerly jumps into the pack and is quite comfortable. I did have to insert a piece of memory foam in the bottom to boost her high enough to see out as she is pretty small. My only recommendation would be deeper water bottle pockets on the sides.