Louie, the Colorado Mountain Dog, looks like a giant gray cloud on legs, and people cannot get over his size.

This is read by an automated voice. Please report any issues or inconsistencies here. Greyhounds can hit 40 miles per hour but are famously calm couch potatoes who prefer lounging indoors to constant ...

Find your ideal companion with our complete guide to popular small dog breeds, including temperament, health, and care tips.