What happens when rats ingest tracking powder?

When rats ingest tracking powder, the primary mechanism through which this occurs is via grooming. Rats are naturally inclined to groom their fur, and during this process, they can ingest substances that are on their coat. Tracking powder is often used in pest control to monitor or eliminate rodent populations, and when the rats come in contact with it, they inadvertently consume the powder while maintaining their grooming behaviors.

This method allows pest control professionals to not only track the movement of these pests but also to apply a control measure that works through the ingestion of the powder, which is designed to lead to the desired health outcomes for the rats consuming it. It's important to understand that the other answer choices do not accurately reflect the mechanism of action or health outcomes associated with tracking powder ingestion. While lethargy and disorientation may be factors in other contexts, they do not specifically relate to the direct effects of ingesting tracking powder in rats.