Which condition is associated with overheating in animals?

Heat stroke is a serious condition that occurs when an animal's body temperature rises to dangerous levels, typically due to prolonged exposure to high temperatures, vigorous exercise, or humidity. In this state, the animal's ability to regulate its body temperature is overwhelmed, leading to a breakdown of normal physiological functions.

Symptoms of heat stroke can include excessive panting, drooling, lethargy, confusion, and even collapse. Without immediate intervention, heat stroke can result in severe organ damage or death. Recognizing the risk factors and early signs is crucial for preventing this life-threatening condition, especially in certain breeds that are more prone to overheating.

While the other options may relate to various health issues in animals, they do not specifically address the risks associated with overheating. Calculus is related to dental issues; anisocoria pertains to unequal pupil sizes, and tachycardia refers to an increased heart rate, which can occur as a response to various stressors but is not exclusively tied to overheating. Thus, heat stroke stands out as the condition directly linked to animal overheating.