Will Falconer, DVM Moderator
Amazing longevity of immunity example. Similar to a vet colleague of mine who, not wanting to get further vac'd after vet school (we all likely had at least two doses), she titered herself. Her rabies titer climbed for the first decade of practice, with no further rabies vaccinations. It was solid for many, many years after that until we lost contact with each other.
I'd make one significant money saving suggestion to you, however: once you have a positive titer, you can stop testing. Your animal has become immunized and a titer that drops off later in life does NOT mean the immunity is gone. Thanks for sharing your story of DOI here.