Because it's cause dear to my heart, as an aside, The ASPCA does so much to help animals in need , as do local shelters. If you want to help, there are many ways. I know my local shelter is always looking for not simply monetary donations but pet food, old towels, hand sanitizer, baby wipes and so much more. Call your or hit their website and you might just find you have these items they need so much lying around.
Also, if you are looking for a pet , please do look at your shelter or at a breed rescue. Most every breed of dog has a rescue in each state or close by . Shelters/rescues are not simply mixed breeds, not that there is anything wrong with that but as a former volunteer, I heard many times, well I want a purebred ______ and I don't think a shelter will have it. I have a beautiful, papered German Shepherd , who was a rescue. I have seen Borzois to St. Bernards at my local shelter.
You can find rescues and shelters all over the US at http://www.petfinder.org/