Yes, all dogs, cats, and ferrets in Florida must be immunized against rabies. This is required at intervals of one year or every third year at the discretion of your vet. At no point should you stop taking your pet for rabies vaccinations. Your veterinarian will determine if the vaccine should be temporarily postponed due to health reasons.
The youngest you should vaccinate your pet against rabies is three months. You vet will be able to guide you to the best first vaccination date for your pet. You are required by the state of Florida to vaccinate your pet at four months old. Your pet will then be considered immunized 28 days after the initial vaccination.