I made the mistake of reading "The Lovely Bones" not too long after we lost Sparky (yeah I know, original, the kids named him when they were very young)
Aside from the subject matter of the book being extremely hard to take, there was a part where the family dog dies and crossed over the rainbow bridge and immediately recognized the girl (main character) and was reunited with her many years after she had died. I bawled harder over that part than I ever had for any book I have ever read. I wish someone could have warned me about that!