Labrador Retrievers are a popular breed of dog and are known for their friendly and active nature. They are generally healthy dogs but like all breeds, they are prone to certain health problems. Some of the most common health issues that a Labrador Retriever might develop are:

1. Hip Dysplasia: This is a genetic condition where the hip joint does not develop properly and can cause arthritis, lameness, and discomfort.
2. Obesity: Labrador Retrievers have a tendency to gain weight easily, which can lead to obesity and a host of health problems such as joint pain, respiratory difficulties, and decreased lifespan.
3. Elbow Dysplasia: This is a genetic condition where the bones of the elbow joint do not develop properly, causing arthritis and lameness.
4. Osteochondritis Dissecans (OCD): This is a condition where the cartilage in the joints becomes damaged and can cause pain, lameness, and arthritis.
5. Eye Diseases: Labrador Retrievers are prone to eye problems such as cataracts, progressive retinal atrophy, and cherry eye.
6. Ear Infections: Labrador Retrievers have floppy ears that can trap moisture and bacteria, which can lead to frequent ear infections.
7. Bloat: This is a life-threatening condition where the stomach fills with gas and twists, cutting off blood flow to the rest of the body.
8. Skin Allergies: Labrador Retrievers can be prone to skin allergies that can cause itching, skin infections, and hot spots.
9. Exercise-Induced Collapse (EIC): This is a genetic condition where the dog collapses after intense exercise and is unable to get up for several minutes.
10. Hemangiosarcoma: This is a type of cancer that affects the blood vessels and can be fatal if not caught and treated early.

It is important to keep your Labrador Retriever at a healthy weight and to provide regular exercise to help prevent many of these health issues. Regular visits to the vet and a balanced diet can also help ensure your dog stays healthy. It is also recommended to have your dog tested for genetic diseases before breeding to help reduce the chance of passing on these conditions to their offspring.