Need a pick-me-up today? Watch a video of a smiling dog – it should do the trick. You could go for the dog smiling as his owner takes a selfie or the one where the owner is training their puppy ...

As I leant down to pat him, he suddenly sprang up and bit hard onto my face. His entire body was dangling off me! I need to hold his head and go wherever he goes, I thought, silent with shock. I ...

The cutest of all? When we offer up a big, goofy grin, she matches us with a smile of her own. But are our dogs really "smiling" the way humans do? We asked a veterinarian about what our canine ...