What is a key indicator of a sheep being in a sick condition?

Mucus production is a key indicator of a sheep being in a sick condition because it often signals an underlying health issue, such as respiratory infections or gastrointestinal problems. When sheep are healthy, their mucus production is generally minimal and within normal ranges. However, an increase in mucus can point to disease processes, as the body may produce more mucus to try to clear out pathogens or irritants in the respiratory tract or intestines. Observing changes in mucus consistency, color, or quantity can provide critical insights into the animal's health status, making it a reliable warning sign for potential illness.

In contrast, high energy levels and regular eating are indicators of good health, suggesting that the sheep is functioning normally and not exhibiting signs of distress. Heavy wool shedding can occur due to various environmental factors or normal shedding cycles and does not directly correlate with illness as consistently as mucus production does. Thus, while other factors may contribute to a sheep's overall condition, monitoring mucus production serves as a crucial tool for early detection of potential health issues.