Leonberger Mastiff Dog Breed

Below are details and specs for the Leonberger Mastiff dog breed.

The Leonberger Mastiff is a cheerful, playful, and loyal dog. The Leonberger Mastiff is a loving dog with a lot of energy and a desire to protect his humans; he will bark at strangers approaching or crossing his path, alerting you to their presence. Friendly and good-natured, the Leonberger Mastiff makes good companion dogs as long as they get plenty of exercise. The Leonberger Mastiff is a crossbreed breed where the courageous Mastiff is crossed with the gentle, patient Leonberger.

This high-spirited combination makes a great addition to a household with children and other pets but due to their size should be monitored when interaction is taking place. They are not aggressive and are typically not overly territorial either. The Leonberger Mastiff is generally a mild mannered dog and easy to train, however, there must be a strong leader within the family to train him or he will try to take that position.

Leonberger Mastiffs are big dogs that have big problems even as hybrid vigor might help prevent or lessen some of them. Hybrid vigor may help to weed out some of these ailments, but a domestic situation might increase the risk for others. Since both parent breeds were raised in harsh environments where they were expected to work hard, and being domesticated means they will be a lot less active.

Here are the health problems that can crop up in Leonberger Mastiffs:

• Bloat
• Allergies
• Cataracts
• Hip dysplasia
• Hypothyroidism
• Osteosarcoma
• Perianal fistulas
• Digestive disorders
• Hemangiosarcoma
• Anesthesia sensitivity
• Osteochondrosis dissecans
• Progressive Retinal Atrophy
• Persistent pupillary membranes
• Leonberger paralysis/polyneuropathy
• Canine-inherited demyelinative neuropathy

These dogs are believed to have a life expectancy of 10 to 16 years.