horse tetanus vaccination how often
Revaccinate 4 to 6 weeks before foaling. Foals of mares vaccinated against tetanus in the pre-partum period: Administer a primary 3-dose series of tetanus toxoid beginning at 4 to 6 months of age.A 4 to 6 week interval between the first and second doses is recommended. The third dose should be administered at 10 to 12 months of age.dult horses, previously unvaccinated against tetanus, or of unknown vaccinal history: Administer a primary 2-dose series of tetanus toxoid with a 4- to 6-week interval between doses. Protective concentrations of immunoglobulin are usually attained within 14 days of the second dose of vaccine.