If they cross on to someone's property that's posted No Hunting/No Trespassing it's a criminal offense. Here in NH the Enviormental Police are said to have more powers than our state police & are hell on offenders, so I've been told. Got a warning once for getting 1 foot wet as I hauled up my canoe from a reservior. We still do get idiots shooting in the direction of houses & barns, once killing a women hanging out her laundry, maybe 20 yrs ago, we always posted & had at least 1 dog. I'd say 3 or more dogs are well worth their upkeep if they keep hunters out the same ways they can heard. Three dogs shouldn't be to bad on a farm, we had 16 cat's but they cleared the area of rodents not people. The 1 dog did keep out not wanted salepeople, bible thumpers & I believe had an effect on hunters or maybe that was the bull? You could always aim in their direction, not to close but close enough to take out their rifle.,,,,, while their ready to shoot it.

Barry