There was an incredibly effective ad on American TV that the ASPCA put out. It showed a sheltie (miniature collie tied to a tree and sitting outside in the pouring rain, on Thanksgiving Day), while you could hear the hosts and guests laughing and carrying on inside. A kid asks where the dog is, and the owner says, "Well, he's grown up now, so we keep him outside."
Then the announcer said, "Animals need love, too." It's one of the most moving ads I've ever seen. I cried every time I saw it. I wish they would show it here.