Kate Middleton and Prince William marked National Pet Day with a surprise picture of their dog, Orla, while Sarah Ferguson shared photos of Queen Elizabeth's corgis to mark the occasion.

She's an integral part of the family, but she's rarely seen. On "National Pet Day", Prince William and Princess Catherine ...

It's National Pet Day in the U.K., and Kate Middleton and Prince William took the opportunity to share an adorable snap of ...