I feel the need to point out that, for a vaccine, the vet charges a far lower price than he or she does for a titer test. The profit margin is also higher, yes as vets pass on the cost of shipping and proper storage of vaccines administered to your pet, as well as the needle, syringe, and professional time to give the vaccine. However, the overall profit is still higher for a titer test as the vet increases the price to cover materials and professional time to draw blood, as well as to properly store and then ship the blood to the lab, and then again to cover a professional evaluation of blood results. So vets motivated purely by greed will happily perform titer testing, early and often.
