Well, we don't really farm alpacas but they live on a farm. Alpacas are grazing animals that that like to eat hay. 1 ton of hay should be enough to feed an alpaca for a year, but it really depends on the living conditions and environment. Of course in a cooler environment, they will burn more calories as with people and will then need more food as well. The min. requirement is one fenced-in acre in order to have 5-10 alpacas. They are a herding animal and you shouldn't have just one, they like to live in groups for them to be most happy.