Dzo/Dzomo

Bos grunniens × Bos taurus

A dzo or dzomo is a hybrid between domestic yak, Bos grunniens, and domestic cattle, Bos taurus. The terms vary by region, but dzo is commonly used for a male hybrid and dzomo for a female, especially in Himalayan and Tibetan pastoral systems. These animals combine the yak's tolerance for cold, altitude, and rough mountain grazing with cattle traits such as greater milk yield or different body size. Coat, horn shape, and build vary with the cattle breed used and with later backcrossing to yak or cattle.

Dzo and dzomo are managed as working and production animals in highland communities, where they may be used for plowing, packing, milk, meat, and manure. Male first-generation hybrids are usually sterile, while females are often fertile and important in local breeding systems. Management depends on altitude and season: yak influence helps in cold uplands, but some crosses do poorly in heat and humid lowlands. Herders plan matings carefully because fertility, temperament, milk output, and hardiness can change across generations. Outside their traditional range, these hybrids are uncommon and require facilities and veterinary support familiar with both cattle and yak behavior.