# Old English Sheepdog Health Problems: Inherited Conditions and Preventive Screenings ## Key Takeaways - Old English Sheepdogs are predisposed to several inherited conditions including hip dysplasia, progressive retinal atrophy (PRA), hypothyroidism, and Addison's disease. - Preventive screening is paramount, utilizing methods such as hip radiographs (OFA/PennHIP), ophthalmoscopic examinations by ACVO/ECVO specialists, and thyroid hormone blood tests (Total T4, Free T4, TSH). - Early detection of conditions like Canine Multifocal Retinopathy (CMR) is facilitated by genetic DNA testing, while deafness is reliably diagnosed via the Brainstem Auditory Evoked Response (BAER) test in puppies. - Hypothyroidism is managed with synthetic thyroid hormone replacement (levothyroxine), and Addison's disease requires lifelong hormone replacement therapy (fludrocortisone or DOCP) with careful owner education on crisis recognition. - Regular veterinary examinations, tailored to life stages (puppy, adult, senior), are crucial for monitoring and early intervention, with annual cardiac and thyroid evaluations recommended for adult dogs. --- The Old English Sheepdog (OES), affectionately known as the "Bobtail," is a large, intelligent, and adaptable herding breed. While they are robust working dogs, their genetic history and physical conformation predispose them to a specific set of inherited health conditions. For owners and breeders, the most effective strategy is not merely treating disease, but preventing it through rigorous, breed-specific screening. This article provides a definitive, source-grounded overview of the primary health concerns in the breed, the diagnostic tools used to identify them, and the preventive screening protocols recommended by veterinary professionals. **Owner Triage Summary:** If your Old English Sheepdog exhibits sudden hind-limb weakness, difficulty rising, a "bunny-hopping" gait, seizures, or unexplained behavioural changes, seek veterinary attention immediately. For puppies, early screening for hip and eye health is crucial, while adult dogs should undergo regular cardiac and thyroid evaluations. This guide details what to expect at each life stage. ## At a Glance: Key Health Concerns and Screening Priorities The following table summarizes the most significant inherited conditions in the Old English Sheepdog, their clinical signs, and the recommended screening methods. | Condition | Primary System | Key Clinical Signs | Screening Method | | :--- | :--- | :--- | :--- | | **Hip Dysplasia** | Musculoskeletal | Hind-limb lameness, difficulty rising, "bunny-hopping" gait, exercise intolerance | Hip radiographs (OFA or PennHIP evaluation) | | **Progressive Retinal Atrophy (PRA)** | Ophthalmic | Night blindness, dilated pupils, progressing to total blindness | Ophthalmoscopic examination (ACVO/ECVO certification) | | **Cataracts** | Ophthalmic | Cloudy or bluish appearance to the lens, vision impairment | Ophthalmoscopic examination | | **Hypothyroidism** | Endocrine | Weight gain, lethargy, hair loss, skin infections | Total T4, Free T4, and TSH blood tests | | **Addison's Disease (Hypoadrenocorticism)** | Endocrine | Lethargy, vomiting, diarrhea, collapse, shaking | ACTH stimulation test, electrolyte panel | | **Autoimmune Thyroiditis** | Immune/Endocrine | Asymptomatic early, later hypothyroid signs | Thyroglobulin autoantibody (TgAA) test | | **Canine Multifocal Retinopathy (CMR)** | Ophthalmic | Multifocal gray/tan/red lesions on the retina | Genetic testing (DNA test) | | **Deafness** | Auditory | Unresponsiveness to commands, excessive sleeping, startle response | Brainstem Auditory Evoked Response (BAER) test | ## Understanding the Breed's Genetic Landscape The Old English Sheepdog originates from the pastoral regions of the West Country in England, where they were bred for driving cattle and sheep. The breed's genetic pool, like that of many purebreds, carries recessive and polygenic traits that can lead to disease. A study from the late 20th century, while focused on a specific kennel in Michigan, highlighted a critical point about canine reproductive and developmental health: environmental factors can interact with genetics to produce severe congenital anomalies. In that case, 120 litters of Shetland Sheepdogs were lost over 12 years, with many puppies born deformed. While this study did not involve Old English Sheepdogs, it serves as a powerful historical reminder that breeding outcomes are influenced by a complex interplay of genetics, environment, and management. For the OES, this translates to a need for comprehensive screening that goes beyond simply checking for one known mutation. ## Inherited Orthopedic Conditions ### Hip Dysplasia Hip dysplasia is arguably the most common inherited orthopedic problem in large and giant breed dogs, and the Old English Sheepdog is no exception. This condition occurs when the ball (femoral head) and socket (acetabulum) of the hip joint do not fit together properly. This laxity leads to abnormal wear and tear, resulting in pain, inflammation, and eventually osteoarthritis. **Clinical Signs:** Owners may notice a reluctance to run, jump, or climb stairs. The [dog](/knowledge/veterinary-medicine/clinical-methods/dog) may have a "bunny-hopping" gait, where both hind legs move together. There may be obvious lameness in the hind limbs, particularly after exercise, and difficulty rising from a lying or sitting position. **Diagnosis and Screening:** The gold standard for diagnosis is radiographic evaluation. The Orthopedic Foundation for Animals (OFA) provides a hip scoring system based on a standard ventrodorsal radiograph. Alternatively, the PennHIP method measures joint laxity more precisely and can predict the likelihood of developing osteoarthritis at a younger age. The British Veterinary Association (BVA) and the Kennel Club in the UK also run a hip scoring scheme. Screening is typically performed after 24 months of age for OFA certification, though PennHIP can be done as early as 16 weeks. ### Elbow Dysplasia While less common than hip dysplasia, elbow dysplasia is a significant concern in OES. It is a general term for several developmental abnormalities of the elbow joint, including fragmented coronoid process, osteochondritis dissecans, and ununited anconeal process. These conditions cause lameness in the front legs, often first noticed in puppies between 6 and 12 months of age. **Screening:** Elbow radiographs are evaluated by the same organizations (OFA, BVA) and are often performed simultaneously with hip screening. ## Inherited Ophthalmic Conditions The Old English Sheepdog is predisposed to several inherited eye diseases. Regular eye examinations by a board-certified veterinary ophthalmologist are a cornerstone of preventive health for this breed. ### Progressive Retinal Atrophy (PRA) PRA is a group of genetic diseases that cause the photoreceptor cells in the retina to degenerate, leading to progressive vision loss and eventual blindness. There are two main forms in dogs: early-onset (rod-cone dysplasia) and late-onset (progressive rod-cone degeneration). In OES, the late-onset form is more typical, with clinical signs appearing between 3 and 5 years of age. **Clinical Signs:** The first sign is often night blindness. The dog may be hesitant to walk in dark rooms or may bump into objects in low light. As the disease progresses, daytime vision is also lost. The pupils may become dilated and sluggish to respond to light. Cataracts often develop secondary to PRA. **Screening:** Diagnosis is made through a thorough ophthalmoscopic examination by a specialist. There is no cure, so identifying affected dogs is critical to prevent them from being bred. ### Cataracts Cataracts are opacities in the lens of the eye. They can be inherited or develop secondary to other conditions like diabetes or PRA. In OES, hereditary cataracts can appear at any age. They may be small and non-progressive, or they can mature rapidly, causing significant vision impairment. **Screening:** Regular eye examinations can detect cataracts early. Surgical removal is an option for dogs with mature cataracts, but it is a specialized procedure. ### Canine Multifocal Retinopathy (CMR) CMR is an inherited condition caused by a mutation in the *BEST1* gene. It is characterized by the development of multiple, distinct, gray, tan, or red lesions on the retina. These lesions are often present by 2 to 4 months of age. In most cases, CMR does not cause significant vision loss, and the lesions may remain static or fade over time. However, it is a heritable condition, and affected dogs should not be bred. **Screening:** CMR can be detected via a simple DNA test, making it an excellent example of how genetic screening can complement a physical examination. ## Inherited Endocrine Disorders Endocrine disorders, which involve hormone-producing glands, are another significant category of health problems in the Old English Sheepdog. ### Hypothyroidism and Autoimmune Thyroiditis Hypothyroidism is a common condition in middle-aged dogs, and the OES is a breed with a high incidence. It occurs when the thyroid gland fails to produce enough thyroid hormone. The most common cause is an immune-mediated destruction of the thyroid gland, known as autoimmune thyroiditis. **Clinical Signs:** The classic signs include weight gain without an increase in appetite, lethargy, mental dullness, and exercise intolerance. Dermatological signs are also common, including symmetrical hair loss, a dry and dull coat, hyperpigmentation, and recurrent skin or ear infections. **Screening:** Diagnosis is based on a combination of clinical signs and blood tests. A baseline test typically includes Total T4 (thyroxine). If this is low or borderline, a more comprehensive panel including Free T4 by equilibrium dialysis and canine Thyroid Stimulating Hormone (cTSH) is recommended. For breeding animals, the Thyroglobulin Autoantibody (TgAA) test can detect autoimmune thyroiditis years before clinical hypothyroidism develops. ### Addison's Disease (Hypoadrenocorticism) Addison's disease is a serious condition caused by the destruction of the adrenal glands, leading to a deficiency in cortisol and aldosterone. While it can be a life-threatening emergency, it is also a manageable chronic condition. The OES is one of the breeds with a known predisposition to this disease. **Clinical Signs:** The signs are often vague and intermittent, including lethargy, depression, vomiting, diarrhea, loss of appetite, and increased thirst. Dogs may appear to "wax and wane" in their health. In a crisis (an Addisonian crisis), the dog may collapse in shock due to low blood pressure and abnormal heart rhythms. **Screening:** An ACTH stimulation test is the gold standard for diagnosis. A baseline electrolyte panel can also be highly suggestive if it shows a classic pattern of low sodium and high potassium. ## Inherited Neurological and Sensory Conditions ### Deafness Congenital deafness is a known issue in the Old English Sheepdog, although it is less common than in breeds like the Dalmatian. It can be unilateral (affecting one ear) or bilateral (affecting both ears). The condition is associated with the *PIEZO2* gene mutation. **Screening:** The Brainstem Auditory Evoked Response (BAER) test is the only reliable way to diagnose deafness. It can be performed on puppies as young as 5 weeks old. It is a non-invasive, painless test that measures electrical activity in the brain in response to sound. ### Cerebellar Abiotrophy This is a progressive neurological disease that affects the cerebellum, the part of the brain responsible for coordination and balance. It is a rare but devastating condition. Affected puppies may appear normal at birth but begin to show signs of incoordination (ataxia), tremors, and a wide-based stance between 4 and 16 weeks of age. There is no cure, and the condition is progressive. A genetic test is available to identify carriers. ## The Role of Genetic and Environmental Factors The study by Marks et al. serves as a critical reminder that not all health problems are purely genetic. The investigation into the Michigan kennel revealed a complex scenario where reproductive and developmental failures in dogs, cats, and cows were linked to environmental factors, specifically stray voltage from a deeper water well and new metal and concrete construction. The dogs ceased cycling, males lacked sperm, and puppies were born deformed. This demonstrates that even with a clean genetic background, environmental toxins or electrical interference can cause severe health crises that mimic inherited conditions. For the modern OES breeder and owner, this highlights the importance of a safe, low-stress environment and the need to investigate sudden clusters of health problems rather than immediately attributing them to genetics. ## Preventive Screening Protocols: A Life-Stage Approach Preventive care is the most effective way to manage breed-specific health risks. The following protocols are based on consensus guidelines from organizations like the American Animal Hospital Association (AAHA) and the World Small Animal Veterinary Association (WSAVA), and are tailored to the OES. ### For Puppies (0-12 Months) - **Physical Examination:** A comprehensive exam by a veterinarian to check for congenital abnormalities. - **Ophthalmic Examination:** An initial eye exam by a veterinary ophthalmologist to screen for CMR and other congenital defects. - **BAER Test:** Recommended for all puppies to confirm normal hearing, especially if they will be used for breeding. - **Genetic Testing:** DNA tests for CMR and other known breed-specific mutations can be performed at any age. - **Hip Screening:** While not for definitive certification, a preliminary hip evaluation can be done to assess joint laxity. ### For Adults (1-7 Years) - **Annual Physical Examination:** A thorough exam, including a cardiac auscultation to listen for heart murmurs (which can indicate conditions like dilated cardiomyopathy). - **Ophthalmic Examination:** Annual eye exams by a specialist (ACVO or ECVO certified) are essential to monitor for the onset of PRA or cataracts. - **Thyroid Screening:** An annual blood panel should include a thyroid evaluation. For breeding dogs, a TgAA test is recommended to screen for autoimmune thyroiditis. - **Hip and Elbow Certification:** At 24 months of age, radiographs should be submitted to the OFA or BVA for official hip and elbow scores. - **Electrolyte Panel:** A baseline electrolyte panel can be part of the annual blood work to screen for early signs of Addison's disease. ### For Seniors (8+ Years) - **Semi-Annual Physical Examination:** More frequent exams are recommended to catch age-related diseases early. - **Comprehensive Bloodwork:** A full blood count, biochemistry profile, and urinalysis to monitor organ function. - **Echocardiogram:** An ultrasound of the heart is recommended to screen for heart disease, which can develop with age. - **Ophthalmic Examination:** Continued annual eye exams are crucial as the risk of cataracts increases. ## Evidence-Based Management of Common Conditions Management of these conditions varies depending on the specific disease. - **Hip Dysplasia:** Management focuses on pain relief and slowing the progression of arthritis. This can include weight management, controlled exercise, joint supplements (glucosamine and chondroitin), and non-steroidal anti-inflammatory drugs (NSAIDs) as prescribed by a veterinarian. In severe cases, surgical options like total hip replacement may be considered. - **Hypothyroidism:** This is easily managed with daily oral administration of synthetic thyroid hormone (levothyroxine). Blood levels must be monitored regularly to ensure the correct dose. - **Addison's Disease:** Management involves replacing the deficient hormones. This can be done with daily oral medication (fludrocortisone) or monthly injections (desoxycorticosterone pivalate, or DOCP). Owners must be educated on recognizing the signs of an Addisonian crisis, which requires immediate emergency veterinary care. - **PRA and Cataracts:** There is no treatment for PRA. For cataracts, surgery is an option if the dog is otherwise healthy and the cataract is mature enough to warrant intervention. The primary focus is on managing the dog's environment to ensure safety as vision declines. ## Unsafe Home Remedies and What to Avoid Owners may be tempted to try over-the-counter remedies or supplements without veterinary guidance. This can be dangerous. - **Human Medications:** Never give a dog human pain relievers like ibuprofen, acetaminophen, or naproxen. These are highly toxic to dogs and can cause severe gastrointestinal ulcers, liver failure, and kidney damage. - **Unregulated Supplements:** Not all joint supplements are created equal. Some may contain ingredients that are harmful or interact with other medications. Always use products recommended by your veterinarian. - **Corticosteroids:** Do not administer corticosteroids without a definitive diagnosis. While they can reduce inflammation, they can also mask the signs of a serious condition or worsen others, such as an infection. ## Prognosis and Quality of Life The prognosis for an Old English Sheepdog with an inherited condition varies greatly. - **Hip Dysplasia:** With proper management, most dogs can live a comfortable and active life, though they may not be able to perform in high-level agility or working roles. - **Hypothyroidism:** With medication, the prognosis is excellent, and dogs can live a normal lifespan. - **Addison's Disease:** With consistent medication and monitoring, the prognosis is good. The main risk is an Addisonian crisis, which is a medical emergency. - **PRA:** While blindness is inevitable, dogs adapt remarkably well. With a stable environment and the use of scent and sound cues, they can maintain a high quality of life. ## Emergency Red Flags Recognizing an emergency can save your dog's life. Contact your veterinarian or an emergency animal hospital immediately if you observe any of the following: - **Collapse or sudden weakness:** This can be a sign of an Addisonian crisis, severe dehydration, or heart problems. - **Difficulty breathing:** This is always a serious sign. - **Seizures:** A seizure lasting more than a few minutes, or multiple seizures in a short period, is an emergency. - **Unproductive retching:** This can be a sign of gastric dilatation-volvulus (bloat), a life-threatening condition common in deep-chested breeds like the OES. - **Inability to urinate or defecate:** This can indicate a urinary blockage or a spinal issue. - **Severe vomiting or diarrhea with blood:** This can lead to rapid dehydration. ## Limitations and When to Contact a Veterinarian This article provides a comprehensive overview of common health problems in the Old English Sheepdog, but it is not a substitute for professional veterinary advice. Breed-level information cannot predict the exact health status of an individual dog. The genetic background, environment, and lifestyle of each OES are unique. Therefore, you should always consult with your veterinarian or a veterinary specialist to create a personalized healthcare plan. If you notice any change in your dog's behaviour, appetite, or activity level, or if you have any concerns about their health, contact your veterinarian without delay. Early detection and intervention are the keys to managing inherited conditions effectively. ## Frequently Asked Questions **1. What is the most common inherited health problem in Old English Sheepdogs?** Hip dysplasia is widely considered the most common inherited orthopedic problem in the breed, but endocrine disorders like hypothyroidism and Addison's disease are also very prevalent. **2. At what age should I have my Old English Sheepdog's hips screened?** For official certification with the OFA, the dog must be at least 24 months old. However, a preliminary evaluation can be done as early as 4 months of age to assess joint laxity. **3. Is Progressive Retinal Atrophy (PRA) common in Old English Sheepdogs?** Yes, the Old English Sheepdog is a breed with a known predisposition to late-onset PRA, which typically begins to cause vision loss between 3 and 5 years of age. **4. Can Addison's disease be managed in an Old English Sheepdog?** Yes, Addison's disease is very manageable with lifelong medication, either in the form of daily oral pills or monthly injections, along with regular veterinary monitoring. **5. What is the BAER test and why is it recommended for this breed?** The BAER (Brainstem Auditory Evoked Response) test is a non-invasive test used to diagnose deafness. It is recommended for OES puppies because congenital deafness is an inherited concern in the breed. **6. Are there genetic tests available for Old English Sheepdogs?** Yes, genetic tests are available for several conditions, including Canine Multifocal Retinopathy (CMR) and Cerebellar Abiotrophy. These tests can help breeders identify carriers and make informed breeding decisions. **7. What are the first signs of hypothyroidism in an Old English Sheepdog?** The first signs are often subtle and include lethargy, unexplained weight gain, and a dull, dry coat with excessive shedding or hair loss. **8. How often should an adult Old English Sheepdog have an eye exam?** It is recommended that adult OES have an eye examination by a board-certified veterinary ophthalmologist annually to screen for the onset of PRA, cataracts, and other hereditary eye conditions. ## Sources 1. [Stray voltage and developmental, reproductive and other toxicology problems in dogs, cats and cows: a discussion.](https://pubmed.ncbi.nlm.nih.gov/7631499/) ## Related Clinical & Scientific Guides * [Birman Health Problems: Inherited Conditions and Cardiac Screenings](/knowledge/veterinary-medicine/breed-specific-health/birman-health-problems-inherited-conditions-and-cardiac-screenings) * [Singapura Cat Health Problems: Inherited Conditions and Cardiac Screenings](/knowledge/veterinary-medicine/breed-specific-health/singapura-cat-health-problems-inherited-conditions-and-cardiac-screenings) * [Siberian Cat Health Problems: Inherited Conditions and Cardiac Screenings](/knowledge/veterinary-medicine/breed-specific-health/siberian-cat-health-problems-inherited-conditions-and-cardiac-screenings)