Berners are generally healthy, but like all breeds, they're prone to certain health conditions. Not all Berners will get any or all of these diseases, but it's important to be aware of them if you're considering this breed.

If you're buying a puppy, find a good breeder who will show you health clearances for both your puppy's parents. Health clearances prove that a dog has been tested for and cleared of a particular condition.

In Berners, you should expect to see health clearances from the Orthopedic Foundation for Animals (OFA) for hip dysplasia (with a score of fair or better), elbow dysplasia, hypothyroidism, and von Willebrand's disease; from Auburn University for thrombopathia; and from the Canine Eye Registry Foundation (CERF) certifying that eyes are normal. You can confirm health clearances by checking the OFA web site (offa.org).

• Cancer: Various forms of cancer afflict a large number of Bernese Mountain Dogs and can cause early death. Symptoms include abnormal swelling of a sore or bump, sores that don't heal, bleeding from any body opening, and difficulty with breathing or elimination. Treatments for cancer include chemotherapy, surgery, and medications.
• Hip Dysplasia: This is an inherited condition in which the thighbone doesn't fit snugly into the hip joint. Some dogs show pain and lameness on one or both rear legs, but others don't display outward signs of discomfort. (X-ray screening is the most certain way to diagnose the problem.) Either way, arthritis can develop as the dog ages. Dogs with hip dysplasia should not be bred--so if you're buying a puppy, ask the breeder for proof that the parents have been tested for hip dysplasia and are free of problems.
• Elbow Dysplasia: Similar to hip dysplasia, this is also a degenerative disease common to large-breed dogs. It's believed to be caused by abnormal growth and development, which results in a malformed and weakened joint. The disease varies in severity: the dog could simply develop arthritis, or he could become lame. Treatment includes surgery, weight management, medical management, and anti-inflammatory medication.
• Progressive Retinal Atrophy (PRA): This is a family of eye diseases that involves the gradual deterioration of the retina. Early in the disease, affected dogs become night-blind; they lose sight during the day as the disease progresses. Many affected dogs adapt well to their limited or lost vision, as long as their surroundings remain the same.
• Portosystemic Shunt (PSS): This is a congenital abnormality in which blood vessels allow blood to bypass the liver. As a result, the blood is not cleansed by the liver as it should be. Symptoms, which usually appear before two years of age, can include but are not limited to neurobehavioral abnormalities, lack of appetite, hypoglycemia (low blood sugar), intermittent gastrointestinal issues, urinary tract problems, drug intolerance, and stunted growth. Surgery is usually the best option.
• Von Willebrand's Disease: Found in both dogs and humans, this is a blood disorder that affects the clotting process. An affected dog will have symptoms such as nosebleeds, bleeding gums, prolonged bleeding from surgery, prolonged bleeding during heat cycles or after whelping, and occasionally blood in the stool. This disorder is usually diagnosed between three and five years of age, and it can't be cured. However, it can be managed with treatments that include cauterizing or suturing injuries, transfusions before surgery, and avoidance of specific medications.
• Panosteitis: Commonly called pano, this condition causes self-limiting lameness. At about five to 12 months of age, the dog may start to limp first on one leg, then on another--then the limping will stop. There are usually no long-term effects. Rest and restricted activity may be necessary for a while if the dog is in pain. The best thing that you can do for your Berner is to feed him a high-quality dog food that doesn't have too much calcium or too high a percentage of protein, which some believe may cause pano. Ask your vet for his recommendations.
• Gastric Torsion: Also called bloat, this is a life-threatening condition that can affect large, deep-chested dogs such as Bernese Mountain Dogs. This is especially true if they are fed one large meal a day, eat rapidly, drink large volumes of water after eating, and exercise vigorously after eating. Bloat is more common among older dogs. It occurs when the stomach is distended with gas or air and then twists (torsion). The dog is unable to belch or vomit to rid himself of the excess air in the stomach, and the normal return of blood to the heart is impeded. Blood pressure drops and the dog goes into shock. Without immediate medical attention, the dog can die. Suspect bloat if your dog has a distended abdomen and is salivating excessively and retching without throwing up. He also may be restless, depressed, lethargic, and weak, with a rapid heart rate. It's important to get your dog to the vet as soon as possible if you see these signs.

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