Just saw this I am so sorry poor Tyson n you had to go thru all of this. Cancer x8x8x8x. It is good though that Tyson is now free of cancer and that he is doing well. There actually are many 3 legged dogs all who seem to play and enjoy life well. My friend is going thru cancer with her golden doodle who is less then 5 years old. Two major courses of chemo and he continues to get more and more lumps and bumps. When she notified the breeder (who is pretty big around here) they said sorry to hear this but its not in our lines and hung up on them. She just wanted them to be aware so they could take precautions in future breedings.