Which factor does NOT influence the body temperature in a healthy animal?

The breed of an animal typically does not influence its body temperature in the same way that other factors do. While physical characteristics related to breed may affect certain physiological traits, the average body temperature for healthy animals generally remains consistent across various breeds within the same species.

In contrast, time of day, weather extremes, and excitement can significantly impact an animal's body temperature. For instance, body temperature can vary depending on the time of day due to circadian rhythms, with animals often exhibiting lower temperatures during the night and higher during the day. Weather extremes, such as high heat or cold, can cause fluctuations in body temperature as animals adapt to their environment. Excitement or stress can also lead to temporary increases in body temperature due to heightened metabolic activity.

Therefore, the breed of the animal stands out as the factor not typically associated with changes in body temperature within healthy animals.