What common issue can arise from high anxiety levels in working dogs?

High anxiety levels in working dogs can significantly affect their performance and behavior. When dogs experience heightened anxiety, it can lead to a lack of focus and an inability to concentrate on their tasks. This mental state may result in them making more mistakes while working, as their capacity to process commands or assess their environment is compromised. In such situations, the dogs may struggle with following orders accurately, leading to an increase in errors during performance.

In contrast, the other options inaccurately imply positive or neutral outcomes from high anxiety levels. Increased loyalty to the handler, enhanced scent detection skills, and decreased training costs do not typically correlate with anxiety; rather, they suggest enhanced relationships or performance capabilities, which are not characteristics typically associated with high-stress states in dogs.