Australian Shepherd - Health Characteristics
Dog Breeds
Australian Shepherds typically live around 12.5 years but the breed's longevity may be declining. The median lifespan for breeds similar in size to Australian Shepherds are mostly between 11 and 13 years. The most common health issues noted by Australian Shepherd owners were eye problems.
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Lifespan
Results of a 1998 Internet survey with a sample size of 614 Australian Shepherds, indicated a median longevity of about 12.5 years, but also indicated that the breed's longevity may be declining. A 2004 UK survey found a much shorter median longevity of 9 years, but the sample size was smaller. The median life spans for breeds similar in size to Australian Shepherds are mostly between 11 and 13 yrs, so, assuming the results of the UK study are not representation of the population there, Aussies appear to have a typical life span for a breed their size.
Common Disorders
Based on a sample of 48 living Australian Shepherds, the most common health issues noted by owners were eye problems (Red Eye, Epiphora, Conjunctivitis, and Cataracts). Dermatologic and respiratory problems also ranked high.
Collie Eye Anomaly (CEA) and Cataracts are considered major health concerns in Aussies. Other conditions of note include Iris Coloboma, Canine Hip Dysplasia (CHD), Pelger-Huet Syndrome, Hypothyroidism, and Nasal Solar Dermatitis . A veterinarian should test your Australian Shepherd's hips, eyes, thyroid and DNA (to check for CEA). The Australian Shepherd (as well as Collies, German Shepherds, and many other herding dogs) are susceptible to toxicity from common heartworm preventatives (anti-parasitics) and other drugs. This is caused by a genetic mutation of the MDR1 gene [citation needed]. The most common toxicity is from the heartworm medicine Ivermectin found in products such as Heartgard [citation needed]. (Only at very high doses. Most dogs will not have problems with Ivermectin found in products such as Heartgard Plus.) A test is available to determine if a particular dog carries the mutated gene. Read here for more information[link needed].
Deadly Breeding - Double Merle
Double merling, also known as lethal white, occurs when two merle dogs mate. Double merles are mostly white, and have blue eyes that usually have serious disorders. Not all have eye problems, but all will have hearing problems. Only irresponsible or uninformed breeders will allow two merles to breed and produce double merles.
Common Hereditary Defects and Disorders