Chocolate: A medium chocolate brown color of dog.

Choke Collar: A chain collar that tightens like a noose when the leash is pulled, used to train or control dogs or other animals. Also called choke chain.

Chops: Jowls or pendulous flesh of the lips and jaw.

Chorea: A nervous jerking caused by involuntary contractions of the muscles (may be caused by distemper or hepatitis).

Chow Chow: Any of a breed of heavyset dog originating in China, having a long, dense, reddish-brown or black coat and a blue-black tongue.

Chronic Disease: A disease lasting indefinitely.

Cinnamon: Usually used to describe Chow Chows. Like the color or the spice of the same name, this color is a lightly saturated, yellowish brown. Color definitions may vary by breed. Always check the breed standard for the definitive color description.

Circular Eye: A round eye. Seen in the Smooth Fox Terrier.