Dogs aren't considered "man's best friend" for nothing. They are loyal companions, guardians and as proven here, terrific helpers. This excited Bullmastiff named Millie lives in Scotland with her owner Gail Mackie, and without hesitation rushes to help carry in some heavy shopping bags. They're no trouble for this tough and adorable pup, as you can see when she goes for another round. Training a dog to carry, rather than devour a fresh bag of groceries takes ample patience and resolve. It's not a task for the meek. But as Millie trots alongside her Rottweiler buddies, you can't help but see the excitement on her face. Even when the load gets a little rough, she still keeps going.