Artificial selection. They select the sheep with the best qualities for meat production and breed him/her to other sheep with similar qualities and characteristics.
By the breed of sheep being kept but eventually all sheep end up as meat.
It has been said that Australia rides on the sheep's back. This is a colloquialism to say that the sheep industry in Australia, particularly wool more so than meat, was a driving force in the early economy of Australia. From the time the first sheep were imported by John Macarthur, the new Merino breed was specially developed for Australian conditions. The breed was hardy and able to withstand the Australian conditions, and it produced fine, thick wool which was in great demand in England.
Suffolk Sheep are a large meat breed sheep but are sometimes bred for the wool.
Australia
Dorper
A Damara is a breed of sheep that sheds its wool, it is also described as a 'fat-tail' sheep it is used primarily for meat.
It depends on the type of 'Sheep Herder' that you're talking about. There are certain farms that raise only meat breed sheep. Those 'Herders' would kill there sheep for meat. There are also Wool breed sheep which don't need to be killed because they are raised for there wool and you want them alive so that their wool will grow.
As it is a good farming environment to rear sheep
The most popular meat sheep is the suffix/cross breed. With reletivly short fur and large fore and hind legs its largest purpose is meat over breeding and milk
Suffolk Sheep are a large meat breed sheep but are sometimes bred for the wool.
Lamb, mutton, and hogget (UK, New Zealand and Australia) are the meat of domestic sheep. The meat of a sheep in its first year is lamb; that of a juvenile sheep older than 1 year is hogget; and the meat of an adult sheep is mutton.Distinct from the meat, a lamb also describes a live juvenile sheep, which may or may not be used for its meat. In Australia, the term prime lamb is often used to refer to lambs raised for meat.
Merino