I had dam tree squirrels munch mine last year. I'm in so cal too in the foothills above Pasadena.
OSH has a couple different kinds of repellent. I used the Bonide and they stopped.
Yours looks similar.
I'd come out in the morning and see whole branches stripped sometimes. Other times a few leaves chopped in half.
My wife finally saw a squirrel in the garden one day. I was really going nuts about it ( pun intended lol).
I even thought for awhile it was birds and bought one of those fake owls.
Did the slug thing, diatomaceous earth, etc...
It's the squirrels... The evil squirrels..
LoL