Nice. I just had to put one down and was blessed with brother and sister puppies a few months ago
My fiancé's godfamily just had to put down their old dog on Friday so we went and visited them last night. Not sure what kind of dog but his name was Duke.
He had a massive tumor on his shoulder, and he got so old that he ended up biting 2 people in the household on the face, so it had to be time.