Buchanan was hit by a car and found lying on the side of the road. One of his back legs was too badly damaged to save and was amputated. His remaining back leg we believe with hydrotherapy and physiotherapy may improve as he does sometimes use this but does not walk on it a lot of the time. However his hip does have arthritis in it so improvement will only go so far. For walks he will be in wheels. Buchanan is such a friendly boy and loves all people, other dogs and cats. He is fully continent.