Labradors and humans share the same obesity genes

Pippa flops by the Aga oven chewing on a stick. At just 12 weeks old, this Labrador retriever puppy looks cute but clueless. But when she hears the word "biscuit," her entire demeanor changes. Ears pricked, she's immediately at her owner's feet, gazing adoringly, sitting, even woofing on command.