Milking
Breast Pumping
noun, する verb
Squeeze an udder to get milk. Look at that, you're milking a cow!
さくにゅう
This is a jukugo word that uses the on'yomi readings of the kanji. You should be able to read this on your own.
牧場で搾乳体験をしてきました。
I personally experienced milking at the farm.