This dog wheelchair is specifically designed to fit Corgi dog breeds, known for their long bodies and short legs. Corgi dog breeds are prone to back problems which can impair their mobility. The fully adjustable model helps mobility-challenged Corgis stay mobile, allowing them to maintain a sense of independence and freedom and keep their muscles strengthened, thus reducing muscle atrophy. Designed for Corgis weighing from 20 to 55 pounds. The adjustable wheelchairs can be shipped upon ordering, and are available in Rear or Full Support/4-Wheel, depending on whether the dog is weak in just the hind legs or front legs as well.