In England and Wales it is called Year 6 and the pupils are usually 10 to 11 years old. Often it is the seventh year of school; the years being called Reception, Year 1, Year 2, Year 3, Year 4, Year 5 and Year 6.
Quick Answer. According to Animals Australia, the natural lifespan of a dairy cow is approximately 20 years. The average lifespan of a beef cow is 15 to 20 months.
Cows remain pregnant for about 9 months. Beef breeders prefer their cows to have calves in the spring and early summer. These calves can safely live in the pasture in mild weather. Dairy farmers must breed cows year-'round to maintain milk production. These calves are usually bottle fed and kept in calf hutches.