Hi. I was wondering if any of you all revaccinate w/ CDT series after giving a tetanus shot for any kind of procedure. My vet gave my little buckling (now wether) a tetanus before surgically castrating him: This is a excerpt from Onion Creek website. I knew I read this somewhere, but couldn't remember where. I just finally found it. 2 Vets in my area have told me it's not necessary to revaccinate w/ cdt after a tetanus shot for castration. Tetanus Antitoxin - Over-the-counter product for immediate and short-term protection against tetanus (lockjaw). Tetanus is fatal if not promptly treated. Comes in single-dose vials; use the entire vial IM for adults; cut it back proportionately for kids. No sooner than five days after this medication is last used, the producer will have to re-vaccinate with tetanus toxoid or CD/T (the complete two-injection series given 30 days apart) to reinstate long-term protection. Keep refrigerated Opinions?