history: My dog, Riley had to be put to sleep due to congestive heart failure.  It was one of the hardest things I had to do. My dog_comma_ riley had to be put to sleep due to congestive heart failure
current: I am so sorry to hear about Riley, I know he was an important part of the family. How is everyone holding up after the news?
next: It was one of the hardest things I had to go through but I know that Riley is not suffering anymore so that helps