I think the job is as hard as you want to make it really, it's not the hard job it once was with all the new equipment like automatic drinkers, feeding systems and thermostatic heaters.
There was a day when I was younger when I was falling asleep in the bath at 12 at night knowing I was checking birds at 4/5 again.
It's more stressful than physical I found.....shite jobs like biting soon weeds out the workers or the failures.
Anyway I've never asked anyone too do anything is never do or had never done.
It's a job I'll not miss.