• Hip Dysplasia is a heritable 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 you may not notice any signs of discomfort in a dog with hip dysplasia. As the dog ages, arthritis can develop. X-ray screening for hip dysplasia is done by the Orthopedic Foundation for Animals or the University of Pennsylvania Hip Improvement Program (PennHIP). Hip dysplasia is hereditary, but it can be worsened by environmental factors, such as rapid growth from a high-calorie diet or injuries incurred from jumping or falling on slick floors.
• Juvenile Dilated Cardiomyopathy is an inherited disease that causes sudden death in puppies between the ages of five weeks and seven months. At this time, there is no cure and no way to determine if a puppy will be affected with the disease. The only way for breeders to prevent producing affected puppies is to avoid breeding carriers of the gene.
• Progressive Retinal Atrophy (PRA) is a degenerative eye disorder that eventually causes blindness from the loss of photoreceptors at the back of the eye. PRA is detectable years before the dog shows any signs of blindness. Fortunately, dogs can use their other senses to compensate for blindness, and a blind dog can live a full and happy life. Just don't make it a habit to move the furniture around. Reputable breeders have their dogs' eyes certified annually by a veterinary ophthalmologist and do not breed dogs with this disease.
• Storage Disease (GM1) is a recessive genetic disorder caused by a lack of an enzyme and allows the buildup of toxic substances in the nerve cells. It is fatal to puppies produced by two carriers. A DNA test has been developed to determine whether dogs are normal or carriers. This has dramatically reduced the incidence of both carriers and affected puppies.

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's been tested for and cleared of a particular condition.

In Portuguese Water Dogs, you should expect to see health clearances from the Orthopedic Foundation for Animals for hips, from the Canine Eye Registry Foundation (CERF) certifying that the eyes are normal, an Optigen rating for progressive retinal atrophy (PRA), and a DNA test for GM1 (storage disease).

Because some health problems don't appear until a dog reaches full maturity, health clearances aren't issued to dogs younger than 2 years old. Look for a breeder who doesn't breed her dogs until they're two or three years old.

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