Inserts a new section (titled "20 Prohibition on captivity of mink") after section 19 of the Animal Welfare Act that prohibits interstate and foreign commerce in, and the breeding or possession of, American mink raised in captivity for fur production; provides a statutory exception referencing 16 U.S.C. 3372(e)(2)(A)-(E); and authorizes a Secretary, subject to appropriations, to seek to purchase privately owned mink farms with offer amounts based on a 3-year average of mink and the infrastructure value of the farm.