Hogs are not a critter that we can raise at our house, but they are being considered as part of a rotational paddock grazing system. I will try to skim the surface of raising hogs within a system like this, determine stocking levels based on 1/2 acre per week rotation, and review the anticipated yields.
Buy a March or April pig at 6-8 weeks of age, inoculated against cholera. By December, it will be at 225 lbs and ready for slaughter (adjust for breed). After 225 lbs, feed is converted more inefficiently.
200 lbs of feed (roughly $60) will supplement a pastured pig. By contrast, 1000 lbs of straight feed (roughly $480) are required if not pasturing.
10 hogs per 1/2 acre per week, initially. This is a weaky held number and will probably be adjusted. Joel Salatin claimed 50 hogs per 1/2 acre paddock, rotated through 10 paddocks. That coincides with the time it takes for pasture to recover after a week of intensive grazing… 10 weeks. Joel was also talking about 20 acres with 4 active paddocks at any time. His 50 hogs may have been 12 in each of four 1/2 acre paddocks for a total of about 50 hogs in a 20 acre parcel and this is more in line with other numbers I have read about.
Hogs are OK with living alone and they also do well in groups. Whether the land supports a few or many, the hogs should be happy with their neighbors.