They are eating the roots to my overwintered chard.
The result is very much like the Bugs Bunny Cartoons where Elmer Fudd watches the carrots in his garden disappear into the ground.
When dealing with gophers I find it more effective for me to just plant plenty to share and to make the garden a less pleasant place to be. I have had success with burying 1/2" hardware cloth at the bottom of my raised beds. It is a couple days of work, but it makes gopher proof beds in which I can reliably grow carrots and potatoes, their FAVORITE foods.
Some people recommend putting hair from the barbershop in the holes, but that creeps ME out.
Apparently the gopher would stay away from all the holes in his tunnel network that the cat peed in and then eventually end up at the hole my cat was waiting at.
Sadly, my gopher catching cat is no longer with us. But I am considering using his strategy.
Only, I'm not sure Buck will cooperate.