heifer
a young female that has not had a calf
calf
a male that has been castrated
bull
mature female that has given birth to a calf
young male beef calves less than a year old
cow
a newborn bovine animal
herd
a group of bovine animals
steer
mature male that has not been castrated
a bovine animal between the age of 1-2 years
yearlings
feeder calves