What is the cause of the dog's sudden and inexplicable death?

There may be many reasons for the sudden and inexplicable death of dogs. Here are some common possibilities:

1. Sudden diseases: Dogs may suffer from some sudden diseases, such as heart disease, poisoning, epilepsy, etc., leading to sudden death.

2. Trauma: Dogs may suffer unknown trauma, such as being hit by a car and falling down. These injuries may lead to internal bleeding or organ damage, and eventually lead to death.

3. Genetic diseases: Some dog breeds have genetic diseases, such as femoral head necrosis in large dogs, which may suddenly attack at some time in the dog's life, leading to death.

4. Old age and physical decline: Dogs have a limited life span. When dogs get older, various organs may fail, leading to sudden death.

5. Cardiac arrest: Dogs may have cardiac arrest due to heart problems and cannot recover.