From the archive record
This video is for animal husbandry and informational purposes only. A bull is an intact adult male of the species Bos taurus . More muscular and aggressive than the female of the species, the cow, the bull has long been an important symbol in many cultures, and plays a significant role in both beef and dairy farming, and in a variety of other cultural activities. Bulls become fertile at about seven months of age. Their fertility is closely related to the size of their testicles, and one simple test of fertility is to measure the circumference of the scrotum: a young bull is likely to be fertile once this reaches 28 centimeters (11 in); that of a fully adult bull may be over 40 centimeters (16 in) Source: Wikipedia