Need a pick-me-up today? Watch a video of a smiling dog – it should do the trick. Any dog can smile, and according to veterinary behavior specialist Dr. Lore Haug, some breeds are even genetically ...

With temperatures expected to soar in the coming days, you might think your dog is 'grinning' as they enjoy a run around the park. But experts have warned that a 'smiling' dog isn't always a happy one ...