Pasturing cows of Holstein dairy breed in a meadow in Russian village. Grazing occurs on a clear summer day, eaten with relish grass. Representatives of this breed is medium in size. Color black and mottled, occasionally come across a red-mottled individuals. Cattle have a strong dairy constitution: huge cup-shaped udder is firmly attached to abdominal wall. Indicators of speak for themselves, so are the most common among world’s dairy herd. These artiodactyls are sensitive to stress.