A species is sometimes defined as a group of organisms capable of interbreeding and producing fertile offspring. Even though this definition is adequate, more precise or differing measures are often...
A young male bull is called a bull calf but once they get casterated ( there balls cut out) they then are called steers.
A young female cow is called a heifer.
No. Male cows don't exist. A cow is a mature female bovine: she cannot be either male or female, only female. Her male counter-part is the bull, which is a male intact bovine.