Originally posted by Banzai Seppuku:

Had a previous post on pig farming etc. Some good info. I am still searching for a 2 star pig. Nothing. Has anyone ever cleared an area and seen a 2 star pig there later or do you think it is an initial one time spawn like rock golems at houses in the mountains. I have been actively searching for a 2 star on distant meadows and killing every pig that isn't to encourage a spawn and still nothing. On a new world I found multiple fairly close to center. Tamed one on first day. I asked about could star rating progress as the pig survived longer but people said doesn't work that way. The last place I found a 2 star was a runestone that I had gone by but didn't come back to for some time. No idea if I wiped the pigs or not.
Also playing with moving pigs by boat. Oddly first time I tried on a no star made it quite far and all the way to base boat and land. Tried a 1 star and each time it fails. Pig seems to get caught by the waves and splat. Once within a stones throw of land. Maybe just luck.

seed can affect difficulty(aka stars) from what I have read around. some world probably dont have 2 star boars or is extremely rare.