Caring for a Three Legged Dog or Cat

Harley my adopted Great Dane is my life! He was adopted 2/13/11 at 2 yrs old, escaped our home just 3 days later I suppose looking for his previous home and was missing in the freezing cold for 7 days. He was hit by a car. I did not give up and found him 9 miles away on 2/23! He has not left my side since, doesn't even need a leash. In April of 2012 he was very sick and we took him to the ER. Found out why he was such a skinny Dane (we just thought it was 2 yrs of neglect before we adopted) and here he was diagnosed with Addison's disease. After a week in ICU and multiple blood transfusions from the ulcers the disease caused, he is healthy as can be going to 130+lbs from 90 and gets a shot of Percorten every 25 days. Now he has bit hit with this bone cancer and had his front left leg amputated on 12/4. He is doing amazing and starts chemo on 1/2. I know he will be ok, he has 6 lives left!!!!