Intimate Enemies (2000)

Life on the savannah of southern Tanzania is a study in contrast between rainy and dry seasons. When water is abundant, the wildebeest at the rivers provide food for the lion population, while the buffalo graze contentedly on the succulent grasses in the hills. The two great adversaries -- lion and buffalo -- can keep their distance. Intimate Enemies is a film about the relationship between these two great animals as a drought forces them into a titanic battle

Unfortunately the movie Intimate Enemies is not yet available on HBO Max.