I too follow Dr. Dodds, Dr. Schultz (love!), and Dr. Rogers -- love reading their stuff!
Here's the thing that bothers me about Dr. Dodds' chart above (there is another one online that I use as well, but have the one you're using too, Kath)...and maybe someone can help clear this up. (EllieMay/Crystal, remember when we've tried to figure this out many times before?
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Okay, so....why does the Dr. Dodds chart seem to indicate that the 14-16 week shot is 'optional'. Arguably, that's THE most crucial shot, since the MDAs (maternally derived antibodies) have the least chance, by far, of interfering with (or blocking completely) the vaccine.
Quote from Dr. Schultz:
"No combination core product currently available will immunize an acceptable percentage of puppies when the last dose is given at 10 weeks of age. The last dose should be given at around 16 weeks of age, regardless of the number of doses given earlier. In the absence of MDA - it only takes a single dose to prime, immunize, and boost. Nevertheless two doses are often recommended, particularly in young animals, to be sure one is given when MDA cannot block. That is why in the puppy or kitten series, the last dose should be given at around 16 weeks of age or later."
Another thing to consider for DOI is the strain being used, here are the different strains and their DOIs for distemper:
Rock born Strain---7 yrs/15 yrs---(challenge/serology)
Onderstepoort Strain---5 yrs/9 yrs---(challenge/serology)
Canarypox Vectored rCDV---3 yrs/4 yrs---(challenge/serology)
All of this is why vaccines are so confusing...to me as well.
Even though this kiddo could have cellular immunity (but no humoral immunity, as indicated by the titer)....and cellular immunity is the goal...if it were me, I would probably get the vaccine like others have mentioned.
{I know we keep hearing that this Dr. Dodds chart is the 'correct' one, but it has never been clear to me why she would indicate the 16wk shot is optional, when it's the most crucial}