N.H. Rev. Stat. Ann. § 473:5

All fences of such height as to be reasonably adequate for their purpose and in good repair, consisting of rails, timber, boards or stone wall, barbed, electrified or woven wire, and all brooks, rivers, ponds, creeks, ditches, hedges and other things deemed by the fence-viewers to be equivalent thereto, shall be accounted legal and sufficient fences.