Dairy “Day Full of Back” Episode 4 Nose rotation and devastation

Do you really need a nose ring or deodorant?

The training center staff was also injured at this time, but fortunately it was a minor injury.
But what if the cow was not taken down …
It was a terrifying event when I thought about it.
Some farms do not practice ringing or deodorizing.
Around me, beef cattle have nose rings, but many dairy cows do not.
Instead, the dairy cows are always discounted.
However, if the cow is rude, even a dairy cow may be wearing a nose piercing.
It depends on the farm and the cow.

Ushikawa is about to finish his training and has begun thinking about finding a job. Why do you choose to raise dairy cows?