Which of the following is an example of a nonleading question during a history-taking session?

During a history-taking session, nonleading questions are designed to elicit information without suggesting a specific answer or influencing the respondent's reply. These types of questions allow the client to provide their observations in their own words, which can lead to a better understanding of the pet's condition.

The correct choice, which asks when Sophie's lameness seems to get better, is ideal because it prompts the owner to describe their experiences regarding the pet's lameness without framing the question in a way that implies a particular response. This approach encourages a more open dialogue, enabling the veterinary team to gather accurate and comprehensive information.

In contrast, the other choices provide suggested contexts or hints that may lead the respondent towards a particular answer, which could influence the reliability of the information gathered. For example, asking whether Sophie's lameness is getting worse at night implies a worsening condition, potentially biasing the owner’s response. Focusing on what the client has tried with medication also leads them toward discussing their actions rather than simply sharing observations about Sophie's condition. Similarly, asking about their perception of pain levels introduces a subjective interpretation that may not fully reflect the situation.