Cat. Barn or feral, keep it outside and only give it water and dry food. Let it in the garage during extreme heat or rain.
Deer Piss. This is a bag of something safe for your pets, purchase at Home Depot, cheap, and it repels rats, gophers and squirrels. We didn’t even open the bag, just set it on the back steps and the family of squirrels under our house moved away.
Gopher snake. I don’t know if you can buy one, or how to make it stay around, but California is full of them. They are good to have because they compete with rattlesnakes. If you have gophers, you are attracting the 99 types of rattlesnakes in your ares, j/s
Chili pepper powder etc. Gophers do not like hot spices. Put some cheap dry hot spices down every entrance hole.
