Bob Barker has been an advocate for animals for years. His signature campaign is for spaying and neutering companion animals and adopting from animal shelters. I remember him always signing off The Price is Right with a reminder to people to "Help control the pet population. Have your pet spayed or neutered". But he's been involved in many animal causes, anti-whaling, animals in entertainment, elephants in zoos, animal welfare laws, etc. Check out the Bob Barker vids below. Good stuff.
Interview with Bob Linden of Go Vegan Radio. (audio only)
Bob Barker on The Price is Right with his classic sign-off.
An advocacy piece about the work Bob Barker has done for animals in his career.