Well it's true.
I'd like to introduce you to Dottie. Half short haired border collie and half Pyrenees Mountain dog. She's got the markings of the collie but the size of the Pyrenees. This photo is a few weeks old. She's 5 months and just under 40 pounds now. If you look on her foot you'll see the rear dew claw, a surefire giveaway of one of the mountain dog breeds.
dottie.jpg