Ultrabac 7 cattle and sheep vaccine from Zoetis is a killed bacterial vaccine for protection against diseases caused by CI. chauvoei, septicum, novyi, sordellii and perfringens types C & D in healthy cattle and sheep. Dosage: Cattle - 5 ml SQ. Sheep - 2.5 ml SQ. Revaccinate in 4-6 weeks. Revaccinate annually. 21 day withdrawal.