An example of a triangle diagram appears to the right. An organizational chart is the diagram of a hierarchy within an organization, and is depicted in tree form below.
Cow's milk can range from 3.7 to 5.1% lactose, although most milk in the U.S. is around 5%. So water buffalo milk may be slightly lower in lactose but not significantly so. I certainly wouldn't call it a low lactose product.
In general, goat's milk is considered to be easier to digest than cow's milk. Unfortunately, however, goat's milk contains a similar concentration of lactose as cow's milk. Raw cow's milk contains 4.7% lactose. In comparison, goat milk is also 4.7%, while milk from other bovids ranges from 4.6% to 5%.