My dog who was 8 and 1/2 years old and a great dog had to be put to sleep yesterday. He was in horrible pain and when we went to a veterinarian university in our area to figure out what it could be we found out it is almost surely rapid onset cancer. He would have had to go through all sorts of testing and been heavily medicated away from home for probably a week. With the most likely results being that there was not much that could be done except have him be in continued pain till he died. He wasn't eating and could not stay standing with ease any more. I am so sad. It went from a sore paw a month ago to pain all over, not eating, and unable to stand like normal yesterday.