Brucellosis: A chronic disease caused by the bacterium Brucella canis and characterized by prolonged disorders of the genital tract, including infertility.

Brush: A bushy tail; a tail heavy with hair.

Brushing: A gaiting fault, when parallel pasterns are so close that the legs brush in passing.

Buff: Off-white to gold. Color definitions may vary by breed. Always check the breed standard for the definitive color description.

Bulldog: A breed of short-haired dog characterized by a large head, strong square jaws with dewlaps, and a stocky body. It was originally bred for bullbaiting.

Bullmastiff: A large, heavy-set, powerful dog of a breed developed from the bulldog and the mastiff.

Bull Neck: A heavy neck, well-muscled.

Bull Terrier: A breed of dog having a short, usually white coat and a tapering muzzle, developed in England by crossing a bulldog with a now extinct breed of terrier.

Burr: The inside of the ear; i.e., the irregular formation visible within the cup.

Butterfly: A partially unpigmented nose; i.e., dark, spotted with flesh color.

Buttocks: The rump or hips.

Button Ear: A small, neat ear with the flap folding forward, covering the opening of the ear.

By-Products: Animal products which are not of a sufficient quality to be used for human consumption