Upon such hearing the public utilities commission shall determine whether or not any fence or fences shall be necessary to protect cattle, horses or mules or any other domestic animals being ranged or grazed upon the land designated in such application, from being wounded, maimed or killed by the operation or management of engines, cars or other rolling stock upon such railroad and may then order that fence or fences be constructed and maintained by the railroad company or corporation at such place or places along such railroad adjacent to the lands designated in such petition as the commission in its discretion shall determine and may fix the time within which such fence or fences shall be constructed and may designate the place or places for necessary openings and gates therein and crossings and cattle guards in connection therewith.