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.
Over burgers and a few beers, we started talking about our cowherd. My husband mentioned that we had a few 15-year-old cows that we would likely cull this year. Our companions seemed shocked that we had several cows that old in our herd and said their oldest cows were just shy of a decade. It got me thinking about the value of a cow in a cow-calf operation. How long should a cow stay in your herd? How long is too long?