N.H. Code Admin. R. Agr 1704.04
(a) Requirements for primary enclosures for animals shall be as follows:
(1) Primary enclosures, including the floors, shall be structurally sound and maintained in good repair to:
(c) Primary enclosures shall be constructed and maintained so as to provide sufficient space to allow each animal to:
(d) In addition to the requirements in (a) through (c) of this section, additional space requirements shall be provided for dogs as follows:
(1) In addition to the provisions of Agr 1703.04(c), each dog housed in any primary enclosure shall be provided:
a. A minimum square footage of floor space equal to the mathematical square of the sum of the length of the dog in inches, as measured from the tip of its nose to the base of its tail plus 6 inches, expressed in square feet, as in the formulas below:
(length of dog in inches + 6) x (length of dog in inches + 6) = Required area in square inches
Required area in square inches = Required square feet of floor space/144; and
(2) If dog houses with chains or tethers are used as a permissible exception to primary enclosures for dogs kept outdoors, the chains or tethers used shall be:
Source. #10834, eff 5-21-15 (formerly Agr 1702.04); ss by #14164, eff 12-31-24