Lovely quote that I have modified a bit. Please modify for any species of animal who is special for you.

It came to me that every time
I lose a dog or a cat, they take
a piece of my heart with them.

Every dog or cat who comes into my life
Gifts me with a piece of their heart.

If I live long enough, all the components of my heart
will be dog or cat, and I will become as
generous and loving as they are.