Gracie the Ancient Ridgeback, my heart dog, left for the Rainbow Bridge December 19, 2008. Today, I found the following quote, and it helped the grief. Hope it helps you too.
"It came to me that every time I lose a dog they take a piece of my heart with them. And every new dog 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, and I will become as generous and loving as they are."
Anon
Agnes