Will Falconer, DVM Moderator
Ah, Jeri, you've unleashed Mistake #7! As it wasn't directed in the comments on that FB post, I'd forgotten this.
Everybody get this? ANY sign of a titer means that animal has responded to the virus and the use of "protective" levels is largely meaningless (unless it's for export, usually internationally).
Good catch, Jeri, and thanks for telling about Ron Schultz on this issue. I'd never heard this, and it's a corroboration of what's been in my mind for a long time now.