Are you sure that your pet is fully immunised. Even after full immunisation it is not necessary for every one to develop full protective immunity as it can be suggested by serum level of antibodies
There are not any side effects of rabies vaccination
and it gives long term immunity so it is better to take the three initial dosage of vaccine
and till then observe the pet.
Are you asking for non veg food? If yes then off course you can take non veg without any fear.