When you buy chickens or ducks in a supermarket, their hair is ripped clean for you already and you just need to cook them.
However, if you have a farm raising chickens or ducks, you need to pull out their hair before cooking them.
I say "pull out" because their hair and its root must be removed, so I don't think people "scraped a chicken's hair before cooking" because the root of the hair is still in the chicken and it won't be nice eating it with a bit of hair in its skin.
Do we have a verb to express "pulling hair of chickens/ ducks/ birds etc before cooking them" in everyday English?
For example, I pulled out/ plucked the chicken's feathers before cooking it