Leonberger

Dog breed · Germany

Overview

The Leonberger is a German breed of large dog. The breed name derives from that of the city of Leonberg, in Baden-Württemberg, where it was bred in the mid-nineteenth century.

Temperament

Temperament: First and foremost a family dog, the Leonberger's temperament is one of its most important and distinguishing characteristics. Well socialized and trained, the Leonberger is self-assured, insensitive to noise, submissive to family members, friendly toward children, well composed with passersby, and self-disciplined when obliging its family or property with protection. Robust, loyal, intelligent, playful, and kindly, they can thus be taken anywhere without difficulty and adjust easily to a variety of circumstances, including the introduction of other dogs. Proper control and early socialization and training are essential, as this is a giant breed.

"This is an outstanding water rescue dog. Only a short period of training it needed to augment its natural instincts." Its double-layered waterproof coat traps air and aids in buoyancy. Webs between the toes make for a powerful swimmer.

Appearance

Appearance: The Leonberger is a large, muscular, and elegant dog with balanced body type, medium temperament, and dramatic presence. The head is adorned with a striking black mask. Remaining true to their early roots as a capable family and working dog and search-and-rescue dog (particularly water), the surprisingly agile Leonberger is sound and coordinated, with both strength in bearing and elegance in movement. A sexually dimorphic breed, the Leonberger possesses either a strongly masculine or elegantly feminine form, making gender immediately discernible. The breed has webbed paws and a thick, dense double coat.

Size, Proportion, And Substance: Height at withers:

Male: 71–80 cm (28–31 in), average 75 cm (30 in)

Female: 65–75 cm (26–30 in), average 70 cm (28 in)

Health

Health: A 2024 UK study found a life expectancy of 10 years for the breed compared to an average of 12.7 for purebreeds and 12 for crossbreeds. A 2015 French study found a life expectancy of 8.75 years. A 2005 Swedish study of insurance data found 74% of Leonbergers died by the age of 10, higher than the overall rate of 35% of dogs dying by the age of 10.

An analysis of Leonberger pedigree found an inbreeding coefficient of 0.29 with just 22 founding dogs. From 1989 to 2004 the life expectancy dropped from 9.4 years to 7.7 years. Almost half suffered from at least one health condition and 21.5% suffered from neoplasia. The next most common group of conditions were orthopaedic and neurological at 15.8% and 14.8% respectively. The most common individual conditions were arthritis, polyneuropathy, hypothyroidism, gastric torsion, and dilated cardiomyopathy.

History

History: In the 1830s, Heinrich Essig, a dog breeder and seller and mayor of the town of Leonberg near Stuttgart in Baden-Württemberg, Germany, claimed to have created the Leonberger by crossing a female Landseer Newfoundland with a "barry" male from the Great St Bernard Hospice and Monastery (which would later create the Saint Bernard). Later, according to Essig, a Pyrenean Mountain Dog was added, resulting in very large dogs with the long, white coats that were the fashion for the time, and a pleasant temperament. The first dogs registered as Leonbergers were born in 1846 and had many of the prized qualities of the breeds from which they were derived. The legend is that the dogs were bred to be an homage of the lion in the town crest and coat-of-arms animal of Leonberg, the lion. The Leonberger dog became popular with several European royal households, including Napoleon II, Empress Elisabeth of Austria, the Prince of Wales, Otto Von Bismarck, Emperor Napoleon III, and Umberto I of Italy. Essig's claim of breeding the dog as described is disputed. Records from as early as 1585 may indicate the existence of Leonberger-type dogs; documents dating from 1601 held by the Metternich family describe similar dogs used to deter the theft of livestock. Either way, no doubt exists that Essig named and registered the breed first. A black-and-white engraving of the Leonberger was included in The Illustrated Book of the Dog by Vero Shaw (at p. 488) in 1881. At the time, Essig's Leonbergers were denounced as an indifferent knockoff of a St. Bernard—not a stable and recognized breed—and a product of a popular fad or fashion for large and strong dogs, fomented in part by Essig's prodigious marketing skills (he gave dogs to the rich and famous).

The modern look of the Leonberger, with darker coats and black masks, was developed during the latter part of the 20th century by reintroducing other breeds, such as the Newfoundland. This was necessary because breeding stocks of the Leonberger were seriously affected by the two world wars. Only five Leonbergers survived World War I and were bred until World War II when, again, almost all Leonbergers were lost. During the two world wars, Leonbergers were used to pull the ammunition carts, a service to the breed's country that resulted in the Leonbergers' near-destruction. Karl Stadelmann and Otto Josenhans are credited as the breed's saviors, bringing them back from almost extinction. Leonbergers today can have their ancestry traced to the eight dogs that survived World War II.

Traditionally, Leonbergers were kept as farm dogs and were much praised for their abilities in watchdog and draft work. They were frequently seen pulling carts around the villages of Bavaria and surrounding districts. Around the beginning of the 20th century, Leonbergers were imported by the government of Canada for use as water rescue/lifesaving dogs. The breed continues in that role today, along with the Newfoundland, Labrador Retriever, and Golden Retriever; they are used at the Italian School of Canine Lifeguard. They have been used successfully as flock guard dogs.

Every pet is one of a kind. This guide covers what's typical for the breed, but your own dog or cat will have their own personality, quirks and needs — think of it as a friendly starting point, not the final word. Whenever you'd like advice tailored to your companion, the team at OC Pets is always happy to help.
Sources (reused under open licences, with thanks): Wikipedia — “Leonberger” (CC BY-SA 4.0) · Wikidata (CC0) · image (CC BY-SA 4.0, via Wikimedia Commons) · Compiled by OC Pets Veterinary Clinic, updated 15-06-2026.