**Core Concept:**
Unprovoked animal bites are a cause for concern as the bite may be contaminated with bacteria or other pathogens. In the given scenario, a boy was bitten by a healthy dog caught by the animal control authority. However, the potential presence of infections needs to be ruled out before determining the course of action.

**Why the Correct Answer is Right:**
In this case, the correct answer is "D" because the next step would be to investigate and rule out the possibility of a bite-related infection. The dog being healthy does not guarantee that the bite wound is clean, as bacteria can be introduced during the bite itself or due to the dog's oral flora.

**Why Each Wrong Option is Incorrect:**

A. This option is incorrect because investigating the boy's health is not the primary focus after a bite injury. Instead, the priority should be to assess and address the wound infection.

B. Although the dog is healthy, the wound should still be examined for signs of infection such as swelling, redness, warmth, and discharge. The dog's health status does not guarantee the wound is clean.

C. This option is incorrect since focusing on the dog's vaccination status does not address the potential infection risk for the bitten person.

**Why the Core Concept is Important:**
Understanding the potential risk of infection from an animal bite, even if the animal seems healthy, is crucial for making appropriate medical decisions. This principle applies to all animal bites, not just dog bites, and emphasizes the importance of evaluating the wound for signs of infection before determining the dog's health status.

**Clinical Pearl:**
In cases of animal bites, consider the possibility of infection regardless of the animal's health status. This is particularly important for unvaccinated humans, who may require vaccinations against rabies, tetanus, or other diseases depending on the animal species and geographical location. Appropriate wound care and follow-up evaluation are essential to ensure the wellbeing of the patient.