Producing lamb in NZ is a veryow intensity operation. Usually lambs are just out on a hill and left there for a few months before slaughter. There's also drench

Producing lamb in NZ is a veryow intensity operation. Usually lambs are just out on a hill and left there for a few months before slaughter. There's also drenching and other stuff, but the actual land they're in isn't irrigated or worked at all. Not so much these days, but it used to be fairly common to just run sheep up a mountain valley and then twice a year muster them down the valley (often with only horses and dogs) for shearing and slaughter. Any sheep that fall ill would either recover or die. That's still the case usually, a lamb is worth a lot less than the vet costs.