I found a great site, called Look to the Stars that shows what charities celebrities donate to! There is a whole page donated to animal charities and a lot of dog rescue groups make the list! Here are a few of the stars who donate to the rescue cause:
Adam Sandler- Animal Rescue Foundation
Clint Eastwood, Bill Maher, Charlize Theron, Tori Spelling-Best Friend’s Animal Society
Robin Williams, Martha Stewert, Johnny Depp, Dolly Parton-Dogs Deserve Better
Maria Menounos, Ryan Seacrest- Dogs in Danger
Keep it up, celebrities!!!