The Essential & Optional Shots For Your Pet Cat There are two general categories of pet vaccines, essential and optional. In order to qualify your pet your vet will ask you questions about your cat’s lifestyle and any specific concerns you may have. These days after the initial courses, durations of immunity for some vaccines are longer than they used to be so you should ask which protocol your vet advises or uses in their clinic. Feline herpes virus, feline Feline Panleukopenia Virus and Feline Calicivirus are considered core advised vaccines. Optional vaccines......