history: I was devastated when I had to put my chihuahua to sleep not to long back.  She had congestive heart failure.  She was my constant companion and I loved her so much!
current: I was devastated when I recently had to my chihuahua Riley to sleep.  She had Congestive Heart Failure.
next: at least Riley passed in their sleep. Hopefully they didn't suffer. i'm sorry you lost a loved one.