Can anyone tell me if it is of benefit to vaccinate market/project pigs over 70 days of age? Does anyone know (besides the 21 day withdrawal from the vaccine prior to slaughter) if there is an optimal time that pigs should be vaccinated?
Background: In our county, we had 2 years in a row of pigs with an outbreak of erysipelas at fair. As a consequence, our local vet recommended vaccinating all pigs at the tagging (a little under 3 months prior to fair) and again at 3 weeks.
It is my understanding that some pigs did not receive the second inocculation. Would this be a problem?