How to tell the difference between Labrador puppies? First of all, Labrador puppies usually have a small bump on the top of their head (it disappears when they grow up). The mouth should not be slender, but short and thick; the ears are droopy. Pull the ears gently. It is best if it is pointed and can touch the corner of the eye on the other side; the parts excluding the head and tail should be in a square proportion; the coat colors are only black, yellow (dark yellow, light yellow), and chocolate, and other colors are disqualified or impure; Black Labradors are generally all black. Some dogs with white hair on their chests are disqualified, but they are not impure. The tail should preferably reach the hock joint.