Me, too. Providing the dog wasn't suffering yet and got along with mine and the disease wasn't contagious, I'd keep the dog until it started to show signs of pain and then put it down. I also like senior dogs. I didn't used to be such a fan, but after a few years with new puppies in the house I have to say I have a lot of love for old dogs who are calmed down and trained! I figure when I get too old to deal with energetic young dog nonsense and old enough that I know I might die before a young dog, I will adopt seniors and we'll be crotchety old farts together.