How much does it cost to own a pet in cities around the world?

We spoke to vets and shops around the world for a global view on the costs of keeping pets. From New York to Barcelona, here are the basic annual costs, and a few things extra.
Can your pet tell that you're high?

Hopes&Fears answers questions with the help of people who know what they're talking about. Today we asked animal experts about whether your dog or cat can tell when you're stoned.