We don't get to choose who gets to be a dog's favorite human. That's something they decide on their own time, in their own way and yes—sometimes it's heartbreaking when you're not the lucky chosen one ...

Many dogs are the big sibling in both age and size when a newborn human baby comes home, but that doesn't last long. For tiny dogs like Melvin the Chihuahua, though, they'll be the smaller sibling ...