How to see if a Cocker Spaniel is pure or impure

How to see the pure or impure Cocker Spaniel? A purebred Cocker Spaniel should have a quadrangular head, large, dark brown eyes, bright, sparkling eyes; strong, short torso and body; deep, broad chest, good rib curvature; strong, short, powerful limbs, good standing posture; medium-length back hair, rich, soft, wavy, long silky hair; tail will appear broken tail, flat tail and back into the level. Head type purebred Cocker Spaniel head should present a quadrangular shape, the forehead is slightly flat, the frontal segment is slightly flat and obvious. The nose should be straight, with a large nose and the color of the end of the nose in harmony with the color of the coat. The eyes should be chosen from a Cocker Spaniel with large, dark brown eyes that are bright, happy and sparkling. The neck should be well muscled and sloped between the shoulders. Excellent Cocker Spaniel with a strong, short torso and body; a deep, broad chest and good curvature of the ribs are preferred. The back slopes smoothly toward the tail; slightly rounded hips and full of muscle can be chosen. Limbs Cocker Spaniel with strong bones, short and strong limbs, good standing posture. The front limbs are straight, the hind limbs are strong, with good knee flexion, low property, round and compact feet, cat-shaped toe paws, and lots of long decorative hair between the toes. The tail and back of the Cocker Spaniel have medium-length, rich, soft, wavy, long silky hair on the back; long trimmed hair on the ears, chest, belly and limbs. The tail can be broken, and the tail is flat and horizontal to the back. The coat color of the Cocker Spaniel is russet, black, dark blue, golden, liver, red, lemon, etc. There are often white hairs distributed throughout the body.