Our pet especially dogs needs lot of sports, but when they handicapped they can not play outside, it will make them fell lonely. It is not good for their treatment. The wheelchair is specially designed for dogs and cats with hind legs, so that they can run and play with you. Pets are our families, when they handicapped, don not give them up, one wheelchair will give them a second new life. Wish your pet gets well soon! Nothing makes our pets, with limited to no move in their hind legs, feel loved more than being able to run, play, and explore with their family. Friendly Tips： 1. Select the appropriate size wheelchair for your pet based on the measurement chart shown in the picture. 2. The wheelchair should be inspected monthly and any screws should be tightened to prevent loosening. 3. Please allow 0~1 inch error due to manual measurement. Thanks for your understanding.