For sheep performance vaccine requirements please submit the Sheep Performance Vaccines order form. Please note that Toxovax is made to order due to being a live vaccine. You can use Toxovax anytime up to 4 weeks before mating, which orders need to be placed with the clinic at least 4 weeks in advance to secure your supply. So order at least 8 weeks before you intend to introduce the ram. Toxovax has a 10 day shelf life and is delivered into clinic each Wednesday during the season.