What's the difference between a horse and a donkey? What are the similarities between horses and cows?

(1) Cattle are long-horned artiodactyls, while horses and donkeys are ungulates with no horns on their heads.

(2) Horses are large herbivorous mammals. It is different from other existing horses and equines in that its tail hair and mane are long, there is a callus under the hock joint of its hind legs, and there are some unfixed features (such as larger body, larger hoof, slightly arched neck, smaller head and shorter ears).

(3) The image of a donkey is like a horse, mostly taupe, not dignified. The head is big, the ears are long, the chest is slightly narrow, the limbs are thin and the trunk is short, so the height is roughly equal and square.

Mammals, Chiroptera, Equus, horses and donkeys all belong to Equus, also known as Erdongji, but different species have the same origin and are smaller than horses and zebras, but they have many common characteristics with Equus: the third toe is well developed and hoofed, and the other toes are degraded. The image of a donkey is like a horse, mostly taupe and not dignified. It has a big head and long ears, a slightly narrow chest, thin limbs and a short trunk, so its height and length are roughly the same, and it is square. Thin neck skin, small and firm hooves, strong physique and strong resistance. Donkeys are strong, resistant to extensive farming, not easy to get sick, and have the advantages of docile temperament, diligence and obedience.

Horses are herbivores. Tamed by humans 4000 years ago. The horse of Przewalski's gazelle (66 chromosomes) and domestic horse (64 chromosomes) can cross to produce fertile offspring. In ancient times, horses were the main driving force of agricultural production, transportation and military activities. There are about 200 kinds of horses in the world. With the development of productive forces, the improvement of science and technology, the invention and wide application of power machinery, the role of horses in real life is becoming less and less. Horses are mainly used for equestrian sports and milk and meat production, and the feeding quantity is greatly reduced. However, in some developing countries and regions, horses are still mainly used for service and are an important source of service strength. The horse's staple food is grass.