Ella-lousie, have you any experience of pigs?
most people on here have medium-small rare or traditional breeds and these are tame, well-handled, and kept in very small numbers usually in a paddock outside their house, and most have their bellies tickled every day
however the majority of commercial pig keepers in uk have huge herds of fast growing pigs, which aren't handled much, slaughtered young and come from huge parents.
the handling requirements in these 2 situations is very different, and safety for the herdsman is very important. pigs can do a lot of damage as they are very strong and have sharp teeth/tusks. I remember hearing of a boar slicing open a mans thigh with his teeth with a flick of his head, so the dangers are real.
there are interesting pig handling items on Fearings website.