Things seem to be getting covered here really well, but I wanted to add that adopting an animal from animal control/humane society or other rescue groups is the most satisfying thing anyone can possibly do. We were so totally devastated when Sam died that we couldn't breathe. I was seriously concerned that my husband would never recover. Then he saw Gracie's mug shot and then Gracie when he came home.......it was all over. He's totally in love.
So many people comment on how we rescued Gracie, but the reality is that Gracie rescued us.