My father was a butcher my whole life. He slaughtered animals so prepare their meat for sale.
That's awesome!  Did he have to go to school for that, or did he learn it himself?
Some places want you to have a 3 year apprenticeship and then you can become a master butcher. My father learned from his father.
That's great that it is a family tradition!  Butchers have been around a long time, haven't they?
far back as 1272. Today, many jurisdictions offer trade certifications for butchers. Some areas expect a three-year apprenticeship followed by the option of becoming a master butcher.
Duties.
Butchery is a traditional line of work. In the industrialized world, slaughterhouses use butchers to slaughter the animals, performing one or a few of the steps repeatedly as specialists on a semiautomated disassembly line. The steps include stunning (rendering the animal incapacitated), exsanguination (severing the carotid or brachial arteries to facilitate blood removal),
to move, you know? I didn't want to be just a BMX racer my whole life. So that's where I switched to downhill Mountain biking. It was new to me; it was like BMX when I first started."br
Fraser: "So you were basically bored riding BMX?"br
Pete: "Exactly!" ----dirtrag.com 1998
He went on to have a career almost as successful racing mountain bikes as he did racing BMX, earning several titles starting in 1992. His main MTB discipline is in