Vol. I · Canis familiarisA public field register
The Dog Codex

A contemporary encyclopedia of well-known breeds — origin, type, temperament, and care.

Non-Sporting group · United Kingdom

Bulldog

Also entered as British Bulldog, English Bulldog

Bulldog
Plate · bulldog

Photo: Canarian, CC BY-SA 4.0, via Wikimedia Commons

Size
Medium
Height
31–40 cm
Weight
18–25 kg
Energy
Low
Intelligence
Moderate

Overview

The Bulldog is a medium, thick-set British breed whose ancestors baited bulls; the modern dog is a companion with an undershot jaw, rolled shoulders, and a kind, stubborn demeanor. Extreme conformation has made breathing, cooling, and whelping veterinary topics as much as aesthetic ones.

Origin

Bull-baiting dogs of England were athletic and more moderate in muzzle than today's show Bulldog. After baiting was banned in 1835, fanciers reshaped the breed toward the exaggerated, lower-slung companion. The AKC recognized it in 1886. It became a national cartoon of British tenacity.

Size & weight

Males about 23 kg, females 18 kg in the standard—many pets are heavier, to their cost. The body is massive for the height, with a broad skull and short tail, straight or screwed.

Temperament

Typically placid, stubborn, and people-loving. They can be dog-selective. They are not joggers and not effective guard dogs despite the scowl, which is anatomy, not attitude. Puppies are more boisterous than the adult sofa stereotype.

Energy

Low. Short, cool walks. They overheat in minutes in humidity. Do not interpret snorting during mild play as enthusiasm alone—it can be air hunger.

Intelligence

Companion mastiff type: Bulldogs are typically amiable and not highly driven to formal work; keep training short and patient.

Intelligence here means typical trainability, not a ranking of the dog.

Coat & grooming

Straight, short, and fine, in brindle, white, red, fawn, piebald, and combinations. The hide is loose, especially at the head and shoulders.

Clean facial wrinkles and the tail pocket daily to weekly. Wipe after meals. The coat itself is simple; fold care is not.

Health notes

Brachycephalic obstructive airway syndrome, hip and elbow dysplasia, cherry eye, entropion, skin-fold pyoderma, and a very high cesarean rate in breeding bitches. Heat stroke is an emergency waiting for a warm day. Lifespan is often 8–10 years. Ethical pressure toward more moderate heads is growing in several countries.

Care

Climate control is part of husbandry. Keep them lean. Use a harness. Learn BOAS signs. Choose breeders (if any) working to more open airways; consider whether the breed's current form matches your ethics. Never fly them in cargo.

Fun facts

  • Yale, the University of Georgia, and other schools use the Bulldog as a mascot—the scowl photographs well.
  • Historical bull-baiting dogs could seize a nose and hold; the modern companion is not that athlete.
  • Some countries have restricted showing or importing extremely brachycephalic Bulldogs on welfare grounds.

The Dog Codex is an editorial reference, not veterinary advice. Health notes summarize conditions that appear in breed literature; they do not diagnose an individual dog and do not replace examination by a licensed veterinarian.