; (B) examination, testing, treatment, or an operation conducted for veterinary purposes, but only if performed by or under the direct supervision of a licensed veterinarian; (C) the five-day period before the pig’s expected date of farrowing; and (D) slaughter conducted in accordance with the Humane Methods of Slaughter Act ( 7 U.S.C. 1901 et seq. ). (3) Calculation of usable floorspace For purposes of paragraph (1)(B), the total square footage of floorspace provided to each breeding pig in an enclosure shall be determined by dividing— (A) the total square footage of floorspace provided to all the animals in such enclosure