The November 2008 issue of Highlights for Children has published "The Tell-Tale Wag".
Just arrive home from school? If you own a dog, his body wiggled and his tail wagged. He’s sooo happy to see you. Now look closer. On which side of his body does his tail wag? If it flutters more on the right of his rump, he loves you a lot. If your dog has some negative feelings, his tail wags to the left.
Interested? The November 2008 issue of Highlights for Children tells a lot more. Just turn to the center page and enjoy.