Last updated on October 12th, 2026 at 11:01 am
Inherited Diseases in Labrador Retrievers: Health Testing and Prevention
Labrador Retrievers are known for their friendly personalities, intelligence, and athletic ability. Although many Labs live long, active lives, the breed can be affected by inherited diseases involving the joints, eyes, muscles, skin, and other body systems.
Understanding inherited diseases in Labrador Retrievers helps breeders make informed breeding decisions and helps puppy buyers ask better questions before bringing a dog home. Health testing cannot guarantee that a puppy will never develop a health problem, but appropriate screening can reduce the risk of producing puppies affected by certain inherited conditions.
At Sierra Valley Labs, we believe prospective owners should understand what health testing can tell them, what it cannot tell them, and which records to ask a breeder to provide.
Health Tests Recommended for Labrador Retrievers
The Labrador Retriever Club's health-testing recommendations include several important evaluations and DNA tests. These address different types of risk, so one test cannot replace the others.
Commonly recommended screening includes:
- Hip evaluation: Helps identify hip dysplasia, a developmental joint disorder.
- Elbow evaluation: Screens for elbow abnormalities that can contribute to pain and arthritis.
- Ophthalmologist examination: Checks for inherited and other eye conditions that may not be identified by a DNA test.
- Exercise-Induced Collapse (EIC) DNA test: Identifies the genetic variant associated with this exercise-related disorder.
- Centronuclear Myopathy (CNM) DNA test: Screens for a mutation associated with an inherited muscle disease.
- Progressive Retinal Atrophy, PRCD (PRA-prcd) DNA test: Screens for a variant associated with progressive retinal degeneration.
- Dilute (D-locus) DNA test: Identifies a coat-color variant relevant to Labrador breeding and coat-color genetics.
These recommendations are not a complete list of every genetic test available. Breeders may also consider additional tests based on family history, breeding goals, and veterinary or breed-club guidance. You can review the current AKC Labrador Retriever health-testing recommendations and the UC Davis Veterinary Genetics Laboratory's Labrador Retriever testing information.
1. Joint and Skeletal Conditions
Hip Dysplasia
Hip dysplasia occurs when the hip joint develops abnormally, allowing excessive movement between the ball and socket. Over time, this can lead to joint damage and arthritis.
Signs may include stiffness, difficulty rising, reduced willingness to exercise, or changes in gait. Some affected dogs show few obvious signs when young.
Hip dysplasia is complex and influenced by multiple genes as well as environmental factors. A DNA test for one mutation cannot rule it out. Hip evaluations of breeding dogs are therefore an important part of responsible Labrador breeding.
Elbow Dysplasia
Elbow dysplasia describes a group of developmental abnormalities in the elbow joint. It can cause lameness, discomfort, and arthritis, sometimes beginning when a dog is relatively young.
As with hip dysplasia, elbow health cannot be established through a simple DNA test. Appropriate orthopedic screening is important when selecting breeding dogs.
2. Inherited Muscle and Exercise-Related Conditions
Exercise-Induced Collapse (EIC)
Exercise-Induced Collapse is an inherited condition that can affect some Labradors, particularly during strenuous exercise or intense excitement.
Affected dogs may develop an unsteady gait, weakness, and loss of coordination, sometimes progressing to collapse. Episodes often occur after several minutes of intense activity, although the timing and severity vary.
A DNA test can identify the known EIC-associated variant and help breeders make informed mating decisions. Dogs at risk should have an exercise plan discussed with their veterinarian.
Centronuclear Myopathy (CNM)
Centronuclear Myopathy, also called hereditary myopathy of the Labrador Retriever, is an inherited muscle disorder. Affected dogs can develop muscle weakness, reduced muscle tone, an abnormal gait, and exercise intolerance.
Signs often appear during puppyhood. A DNA test can identify the specific variant associated with CNM and help breeders avoid matings that could produce affected puppies.
Congenital Myasthenic Syndrome (CMS)
Congenital Myasthenic Syndrome is a group of inherited disorders that interfere with communication between nerves and muscles. Labrador-specific genetic variants have been identified.
Affected dogs may show weakness, exercise intolerance, or difficulty maintaining normal movement. The appropriate genetic test depends on the specific variant being investigated. This is an additional test to discuss when family history or breeding circumstances make it relevant.
X-Linked Myotubular Myopathy
X-linked myotubular myopathy is a severe inherited muscle disease identified in Labradors. It can cause generalized muscle weakness and progressive muscle loss in affected puppies, making standing and walking difficult.
Because this condition is X-linked, its inheritance differs from that of a typical autosomal recessive disease. Breeders should interpret results using guidance specific to this condition rather than applying a generic carrier-breeding rule.
3. Eye Conditions
Progressive Retinal Atrophy (PRA-prcd)
Progressive Retinal Atrophy is the name for a group of inherited disorders that cause gradual degeneration of the retina. The PRCD form is associated with a known genetic variant found in Labradors and many other breeds.
Early signs can include difficulty seeing in dim light or at night. Vision may deteriorate over time, potentially leading to blindness.
A DNA test can identify the PRCD-associated variant, but it does not replace an eye examination. Other eye conditions may not be detected by this test.
Stargardt Disease
Stargardt disease is an inherited retinal disorder for which a genetic test is available for Labrador Retrievers. It can affect retinal function and vision.
The significance of a result depends on the specific variant and the dog's genetic status. Breeders considering this or other less commonly discussed tests should confirm the test's relevance with a qualified veterinary genetics provider and interpret the result according to the laboratory's guidance.
4. Metabolic and Blood Disorders
Copper-Associated Liver Disease
Some Labradors carry genetic variants associated with altered copper levels in the liver. Excess copper can contribute to liver damage, but the relationship between genotype and actual copper accumulation is complex.
The ATP7B variant is associated with increased liver copper in Labradors. The ATP7A variant can influence copper levels in the opposite direction, and the combined genetic results and other factors matter. A genetic result alone cannot establish the amount of copper in a dog's liver or diagnose liver disease.
Testing may help breeders and veterinarians assess risk. Dogs with relevant results may need veterinary evaluation, which could include liver-related testing and an individualized dietary plan. Do not put a dog on a restrictive low-copper diet without veterinary guidance.
Pyruvate Kinase Deficiency (PK Deficiency)
Pyruvate kinase deficiency is an inherited disorder that affects red blood cells and can cause chronic, severe hemolytic anemia.
Possible signs include lethargy, reduced exercise tolerance, fatigue, pale gums, and other signs associated with anemia. A DNA test can identify the known variant associated with the disease in Labradors.
Breeders can use test results to avoid producing affected puppies while making appropriate decisions about genetically healthy breeding stock.
5. Skin and Coat-Related Genetics
Hereditary Nasal Parakeratosis (HNPK)
Hereditary Nasal Parakeratosis is an inherited condition that affects the surface of the nose. Affected dogs can develop dry, rough, crusty skin, sometimes with cracks or fissures.
A DNA test is available for the known Labrador-associated variant. A positive genetic result should be interpreted according to the laboratory's report and the dog's clinical signs.
Ichthyosis
Ichthyosis is an inherited skin condition associated with abnormal scaling. Affected dogs may develop visible flakes and changes in the skin's outer layer.
Genetic testing is available for certain variants associated with ichthyosis in retrievers. Because the relevance of a particular variant depends on the dog's breed and genetic background, breeders should use an appropriate Labrador-relevant test rather than assuming that every test marketed for a retriever applies equally to Labradors.
Dilute Coat Color and Color Dilution Alopecia
The D-locus, or dilute gene, affects the intensity of coat pigment. In dogs with the relevant genetic combination, black pigment can appear charcoal-colored and chocolate pigment can appear silver.
Color dilution is a genetic trait, not by itself a diagnosis of disease. Color Dilution Alopecia (CDA) is a separate coat and skin condition associated with some dilute coat colors in certain breeds and genetic backgrounds. Not every dog carrying a dilute variant will develop CDA.
The dilute variant is relevant to Labrador breeding because it can affect coat color and breeding outcomes. The Labrador Retriever Club includes D-locus testing in its recommended health-testing list. For more information about standard Labrador colors and genetics, see our guide to Labrador Retriever coat colors.
6. Other Genetic Conditions and Additional Testing
Additional genetic variants have been identified in Labradors, including those associated with cystinuria, hyperuricosuria, degenerative myelopathy, and other conditions. The availability of a DNA test does not necessarily mean every Labrador needs that test or that the condition is among the breed's core recommended screenings.
For example:
- Cystinuria: Certain inherited forms can contribute to cystine stone formation in the urinary tract. The relevant test depends on the genetic variant involved.
- Hyperuricosuria (HUU): A genetic variant can increase urinary uric acid and the risk of certain urinary stones. Its relevance should be assessed using the dog's breed background and the test provider's guidance.
- Degenerative Myelopathy (DM): A DNA variant is associated with increased risk in several breeds, but a risk-associated result does not mean a dog will inevitably develop the disease.
- Other rare conditions: Some muscular, eye, metabolic, and skeletal disorders have been reported or tested for in Labradors. Testing decisions should be based on evidence, family history, and current veterinary genetics guidance.
A breeder should prioritize appropriate breed-club screening and select any additional tests thoughtfully, rather than treating a large panel of DNA tests as a substitute for a complete health program.
Why Genetic Testing Matters for Breeders and Puppy Buyers
Genetic tests help breeders understand the variants a dog carries and plan matings to reduce the chance of producing puppies affected by particular inherited diseases. But the interpretation depends on the condition and its mode of inheritance.
What Does “Carrier” Mean?
For a condition inherited in an autosomal recessive pattern, a carrier usually has one copy of the tested disease-associated variant. Carriers for many such conditions are not clinically affected, although the interpretation depends on the specific condition.
When two carriers of the same autosomal recessive variant are bred together, each puppy typically has:
- A 25% chance of inheriting two copies of the variant and being genetically affected.
- A 50% chance of inheriting one copy and being a carrier.
- A 25% chance of inheriting neither copy.
These are probabilities for each puppy, not predictions for an entire litter. They also apply only to the stated inheritance pattern and variant.
A carrier dog does not necessarily need to be removed from a breeding program. For some recessive conditions, breeding a carrier to a dog tested clear for the same variant can avoid producing puppies with two copies, while preserving other valuable traits and genetic diversity. Different inheritance patterns require different decisions.
Most importantly, avoiding a particular genetic disease does not guarantee that puppies will never develop other inherited, developmental, infectious, or age-related health problems.
DNA Tests Are Not the Same as Physical Health Evaluations
DNA tests look for specific genetic variants. They cannot detect every possible cause of a disease, and a negative result means only that the tested variant was not found.
Hip and elbow evaluations assess joint structure. Eye examinations assess eye health at the time of the exam. These tests provide different kinds of information and should be considered together.
A CHIC number from the Orthopedic Foundation for Animals indicates that the required tests for that breed's CHIC program have been completed and the results made publicly available according to program requirements. It does not mean every result is normal. Buyers should review the actual results rather than relying on the number alone.
Questions to Ask Before Buying a Labrador Puppy
When evaluating a breeder, ask:
- Have the puppy's parents had hip and elbow evaluations?
- Are current eye examination results available?
- Which Labrador-recommended DNA tests have been performed, and what were the results?
- If either parent is a carrier for a recessive condition, how was the mating planned to avoid producing affected puppies?
- Can I review the actual health-testing records or look them up in an appropriate public database?
- What health guarantees and veterinary-care terms are included in the puppy contract?
A responsible breeder should be willing to explain the tests performed, share available documentation, and discuss the limits of genetic screening clearly.
For more guidance, read our page on buying a Lab puppy from a reputable breeder, learn about getting a Labrador puppy, and review our Labrador Retriever and dog-owner guides.
You can also learn more about our breeding program through our girls, our boys, and our puppy contract. Review any claims about health testing alongside the relevant records and contract terms.
Helping Labradors Live Healthier Lives
Inherited disease prevention begins with informed breeding decisions, appropriate screening, careful interpretation of results, and honest communication with puppy buyers. No test can remove every health risk, but using the right tests for the right reasons can reduce the likelihood of certain inherited conditions and help families make better-informed choices.
For an individual dog's health, consult a veterinarian. For breeding decisions or complex genetic results, seek advice from a veterinarian with relevant expertise or a qualified veterinary genetics laboratory.
This article is educational and is not a substitute for veterinary diagnosis or treatment.
