We've never been asked about food, either 2 legged or 4 legged upon entry to CA, nor about firewood. Have not been asked, but there is a form (health certificate) your vet can provide to verify your pet has been vaccinated. It has to be signed by a vet, so get an appt and take fido in to make sure he is up to date. Upon re-entry to the US, they (US) will ask to see your dog food. The dog food must be in the bag in which it came in, I had dumped ours into a plastic trash can and US customs took all the food (canine) we had. Zorro is on a prescription diet; It was a $100 bag of dog food. The US will ask about fruit and veggies (they took my limes!). They want you to enter the car/RV lanes, not the truck lanes. They look very narrow, and there is a dogleg in the lane, you'll fit just take it slow.