One of my new favorite books is Katie Loves the Kittens by John Himmelman. When my partner-in-crime first read it she began giggling and handed me the book saying, "This describes Pixie perfectly". And it does.
Pixie must recognize this on some level because she also LOVES Katie and the kittens. She is dying to have it read and re-read to her and frequently wants to talk about Katie and how Katie can't control herself because the kittens are so cute.
You see, Katie is a dog whose owner Sara Ann just got three little kittens. Katie is SO excited by the kittens she runs around the house howling (scaring the kittens). She gets sad because she scares the kittens and tries so hard not to, but then after trying and trying to control herself she breaks down and howls again. Your heart goes out to Katie who really, really wants to do the right thing- but it's just so hard. In the end she wakes up with the kittens on top of her, and then has to try her hardest to stay still so the kittens will keep cuddling with her. She succeeds and everyone is a happy cuddling pile of pets.
If you are familiar with a very caring but impulsive five year old I highly recommend that you read the book. It's a good reminder of how well-meaning our little friends are despite their impulsive actions.