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Leonberger Dog Breed

Aliases: Leo

Life Span: 6 to 8 years
Litter Size: Average of 8 puppies.
Group:  Working Dog
Recognized By: CKC, FCI, AKC, ANKC, NKC, NZKC, KC,
Color: Coat color can range from lion yellow, red, reddish brown, and sandy.
Hair Length: Medium
Size: Extra Large
Shedding: Heavy Shed
Male Height: 28.5-32 in (72-81 cm)
Male Weight: 120-170 lbs (45-76 kg),
Female Height: 25-30 in (64-76 cm)
Female Weight: 110-140 lbs (36-58 kg)

Thyroid Disease - High Risk

The Leonberger ranks #30 among all breeds for autoimmune thyroiditis prevalence. There is a high risk of obtaining a dog that will develop thyroid disease. For this reason you should make sure you, or your breeder, are testing all dogs before breeding.  It may even be a good idea to test dogs that you don't plan on breeding so that any instance of disease can be traced back to breeding pairs and eliminated.

 Rank Among Breeds  Number of Dogs Tested  Percent of Dogs With Disease
 #30  314  11.1%

You can download the full report (on all breeds) by the Michigan State University Diagnostic Center for Population and Animal Health. Here

Other Health Problems

The Leonberger is prone to a serious risk of cancer. In a 2004 UK Kennel Club survey, the most common causes of death were cancer (45%), cardiac (11%), and "unknown" (8.5%)