Awful day at the office? Bad blind date? Or annoyed for no reason? (It happens!) Dog owners know that it just takes one sloppy wet kiss from your furry BFF to turn that frown upside down. It’s even a scientific fact that pets make us happier. And aside from putting smiles on our faces, it turns out pets have the ability to make us healthier. We put together a list of how our pets, particularly dogs, can make us happy, healthy, fit, smiley people—and it’s backed by science, of course!