In my youth I was a gamekeeper of sorts, used to look after 200 odd pheasants from the age of 8 weeks in what was called a release pen, then as they grew they’d escape and create a diaspora in the immediate area until the day a dozen or so guns would turn up and they’d shoot them.
Really beautiful birds as Bob says, but very stupid, I felt guilty about it.
Ducks were the hardest though as you built their trust and saw their personalities, not a job I saw a future in.