Petie lost use of his hind legs about a month ago. It happened suddenly. After extensive testing, the neuro/surgical vets determined he has inflamation of the menengies in his spinal nerves. He is recovering stedily, and can walk around the house and yard, but tires very quickly. We found this stroller on E-bay, so Elliott and I can walk to the park and let Petie out when we get there!