Beef
Steers, bulls (rarely used), heifers and cows, and calves (baby beef, over 3 months old
Heifers- female cows that have not born a calf
calves are too old for veal and too young for beef
Veal
3 weeks to 3 months
Calves (3 to 8 months)
Lamb and mutton (sheep)
Pork (swine)
Pork comes from either sex