I just wanted to give a heads up. We had a 8 year old ridgeback that weighed about 120 pounds. Very healthy dog and happy too. Well, about three weeks ago we noticed he was limping on his left hind leg. We monitored it and checked him daily. He started getting worse, fast. In about two days he was not walking on his leg at all. We took him to the vet and he did an x-ray and said that he had bone cancer. Apparently this is a very fast moving cancer and it just had destroyed his leg. Our options were either to amputate the leg or put him down. We agonized over this for a good day and went back to talk to the vet. Well, due to his size his leg could not be amputated, apparently he just could not get around on three legs and the vet said at that point there was not much else we could do. We made the very difficult decision to put him down. I have never had a dog with this condition and I just wanted to share that so maybe we can prevent this down the road.