Health
American Cocker Spaniels in UK and USA/Canada surveys had a median lifespan of about 10 to 11 years, which is on the low end of the typical range for purebred dogs, and one to two years less than other breeds of their size. The larger English Cocker Spaniel typically lives about a year longer than the American Cocker Spaniel. In a 2004 UK Kennel Club survey, the most common causes of death were cancer (23%), old age (20%), cardiac (8%), and immune-mediated (8%). In a 2003 USA/Canada Health Survey with a smaller sample size, the leading causes of death were cancer, hepatic disease, and immune-mediated.
American Cockers previously high popularity resulted in the breed frequently being bred by backyard breeders or in puppy mills. This indiscriminate breeding has increased the proliferation of breed related health issues in certain bloodlines.
American Cocker Spaniels are susceptible to a variety of illnesses, particularly infections affecting their ears and, in some cases, their eyes. Although the number or percent of afflicted dogs is not known, progressive retinal atrophy (PRA), glaucoma, and cataracts have been identified in some members of the breed. The American Spaniel Club recommends annual eye exams by a veterinary ophthalmologist for all dogs that are to be used for breeding. Autoimmune problems in Cockers have also been identified in an unknown number or percent of the breed, including autoimmune hemolytic anemia (AIHA). Ear inflammations are common in drop-eared breeds of dog, including the American Cocker, and luxating patellas and hip dysplasia have been identified in some members of the breed.
Heart conditions such as dilated cardiomyopathy, where the heart becomes weakened and enlarged, and sick sinus syndrome, which is a type of abnormal heart beating which causes low blood pressure, have been identified in the breed. Phosphofructokinase deficiency is a condition caused by a recessive gene in the breed which prevents the metabolism of glucose into energy, causing the dog to be extremely low energy and unable to exercise. The gene which causes this appears in around 10 percent of the population, but DNA testing can prevent two carrier dogs from breeding and thus creating puppies with this condition.
American Cockers are also prone to canine epilepsy and the related condition known as Rage Syndrome. The latter is a form of epilepsy which can cause a normally placid dog to engage in sudden and unprovoked violent attacks. Initial research shows that both conditions appear to be inheritable.
Read more about this topic: American Cocker Spaniel
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