For dogs and cats 3 months of age or older. Give 1 ml IM or SQ. Revaccinate 1 year later, and every 3 years thereafter. Order needles and syringes separately Rabies Killed. Rabvac 3 is for the protection of horses, dogs and cats against rabies For horses 3 months of age or older. Give 2 ml IM. Revaccinate annually