Cal. Pub. Util. Code § 7626

Every railroad corporation shall make and maintain a good and sufficient fence on both sides of its track and property. If it does not and if its engine or cars kill or maim any cattle or other domestic animals upon its line of road, except where the road runs through or upon public land it shall pay to the owner of the cattle or other domestic animals a fair market price for them, unless the killing or maiming occurred through the neglect or fault of the owner of the animal.