Oreo is a dog who has come a long way. For six months, he survived alone in a shopping centre car park in California.

Of course, we want our pups to be happy from head to tail, but what does happiness look like in dogs? Dog behavior is complex ...

Proprietor Alison Montgomery addresses her three-year-old Chow, Simba, in Hearth & Hound's play yard. Photo by Leslee Bassman ...