I enjoy watching cows and have learned to be a keen observer of dairy cows. A first question to ask is, “Why does it matter that cows bunch together?” When cows bunch together, it compromises production, health, and welfare of the animals. Sun rays that enter a barn and expose cows to direct sunlight will stratify cows and cause bunching when cows are exposed to direct sun rays. Cows will bunch in areas of good airflow to avoid flies, similar to pasture cows that stand in the mud. Dairy cows are known to have thinner hides than beef cattle, and thus, dairy cows are more susceptible to biting flies.