Wow.
I had a ten year old dog once when I was a kid that got hit by a log truck. Crushed the whole left side of his body and knocked his eye out. He survived in a bush by the side of the road for several hours until my dad noticed that he was missing. We took him to the vet to put him down but the vet said, "I think I can save him." My dad said he probably didn't have enough money to pay for something like that so the vet told my dad he'd do it anyway, don't worry about paying him. The eye was not salvageable and the dog required a LOT of care over the next year but he survived... and lived another 11 years! The dog and I were the same age. I had to put him down on my 21st birthday. Some dogs are tough mofos.