usually, most dogs noses tilt down because their nasal cavities don't extend all the way down their snouts. The corners of the mouth droop down, covering the connection of the bottom jaw and the skull. The eyes are usually set back, and the ears are placed neatly on the rear or sides of the head. Feet are rounded, meaning the toes have different lengths. Look at your own hand, it's the same!
The back leg doesn't have a very prominent knee, but it does have a prominent ankle. The head of my dog is a little too big for the eyes and nose... Just a note.
