Cal. Food & Agr. Code § 17128
The act entitled "An act concerning lawful fences, and animals, trespassing upon lawfully enclosed lands," passed March 30, 1850 (Ch. 49, Stats. 1850), and an act entitled "An act concerning lawful fences in the Counties of San Bernardino, Colusa, Shasta, Tehama and Placer," approved April 18, 1859 (Ch. 266, Stats. 1859), insofar as the provisions of each of the acts apply to or affect the Counties of Trinity, Shasta, except that portion described in Section 17126, and Siskiyou, are continued in force, except as to goats, swine, or hogs, which may be taken up in the counties when the goats, swine or hogs estray or trespass on lands of others. The provisions of this chapter apply to goats, swine, or hogs in such counties, but in all other respects the acts specified in this section are continued in full force therein, it being determined that the conditions prevailing in the Counties of Trinity, Shasta, except that portion described in Section 17126, and Siskiyou demand the continued application of the acts in the counties until such time as action is taken pursuant to Section 17124.
Ca. Food and Agric. Code § 17128