Yeppers.But the more I work with a bird trying to save it, the more attached I get. And they become more attached to you and start to show more of their personality. That's what makes it hard.
Tho they are not pets I handle mine often enough that they are pretty calm around me.
ETA...and the longer they are around the more attached one becomes.
I slaughtered all older hens in the first 4-5 years, to make room for new layers.
The first one of those was really hard too.