Thank you all for your kind thoughts and words. We took Cosmo to the surgical consult yesterday. We were very well impressed with the vet and the clinic. The vet spent a lot of time with us, explained options and, when she finally unwrapped Cosmo's leg, exclaimed delightedly, "Oh, this will be easy to remove!" when she saw the tumor. That boosted our confidence! So, Cosmo is scheduled for surgery next Wednesday. His recovery should be fairly easy, and he should be able to bear weight on the surgical leg within about 24 hours. The vet cautioned us that this will not cure the cancer, and it will likely come back, but should buy us enough time for him to live out his life in much more comfort. This is pricey, but we will deal with it. So, life goes on for my big fur kid! Peace, Beth.