Which characteristic is most likely to be observed in a dog that is stressed and distressed?

The characteristic of rapid panting in a dog that is stressed and distressed is a reliable indicator of anxiety or discomfort. When dogs are under stress, their bodies react in various ways, and panting becomes a common response. This physiological change occurs as dogs attempt to regulate their body temperature and handle the heightened state of arousal brought on by stress.

In contrast, a loose body stance typically indicates a relaxed dog rather than one that is stressed. A tail that is high and bristled often signals excitement or aggression, rather than distress. Lastly, wide eyes with focus can indicate alertness or excitement rather than the signs of stress since stressed dogs may display averted gazes or nervous energy instead of maintaining focused eye contact. Thus, rapid panting distinctly aligns with the behavioral patterns observed in dogs experiencing stress or distress.