information:filtering
Senses

Vision is the dominant sense; cattle obtain almost half of their information visually. Being prey animals, cattle evolved to look out for predators almost all around, with eyes that are on the sides of their head rather than the front. This gives them a field of view of 330°, but limits binocular vision (and therefore stereopsis) to some 30° to 50°, compared to 140° in humans. They are dichromatic, like most mammals. Cattle avoid bitter-tasting foods, selecting sweet foods for energy. Their sensitivity to sour-tasting foods helps them to maintain optimal ruminal pH. They seek out salty foods by taste and smell to maintain their electrolyte balance. Their hearing is better than that of horses, but worse at localising sounds than goats, and much worse than dogs or humans. They can distinguish between live and recorded human speech. Olfaction probably plays a large role in their social life, indicating social and reproductive status. Cattle can tell when other animals are stressed by smelling the alarm chemicals in their urine. Cattle can be trained to recognise conspecific individuals using olfaction only.