What is one common health concern for Jack Russell Terriers?

Patellar luxation, commonly known as a dislocated kneecap, is a prevalent health issue in Jack Russell Terriers. This condition occurs when the patella (kneecap) becomes misaligned, which can lead to intermittent lameness or difficulty in walking. The structure of Jack Russell Terriers, including their athletic build and the demands of their energetic lifestyle, make them more susceptible to this issue. If a dog experiences frequent episodes of patellar luxation, it can lead to chronic pain and mobility problems, which may require surgical intervention in severe cases.

While the other choices are also relevant health concerns in dogs, they are not as specifically associated with Jack Russell Terriers as patellar luxation is. For example, hip dysplasia is more common in larger breeds, ear infections are often related to environmental factors and grooming, and heart disease can occur in any breed but is not a primary concern specific to Jack Russells.