If it is any consolation - my ducks like their pen. They go there willingly at night & I made it large enough they can have a big, black tub in there when they can't free range.
I wish they could free range all the time, but between neighbor dogs, racoons, the huge eagles that routinely circle the property, the fact that people are weird... etc, I would rather KNOW when I am at work, or going to bed, that they are safe & sound. I realize it does not mean they are ever 100% safe, but I also know my pen has survived dog attacks, hurricanes, huge blizzards, and at least one skunk's attempt to find some eggs.
I should also say that I am the least "handy" person on the planet. Tools belong to two families - the whoozit, or the whatsit family, as far as I am concerned. (Last week I asked my friend if he had a "vice grip" he said - "You're holding one". It turned out I was looking for "C Clamps". Despite my ineptitude with these foreign objects, I designed & built my duck coop BY MYSELF, and it is the best coop on the place.
These are domesticated animals. I think they feel safer with a pen to go to.