Poulvac Pabac IV Dosage and administration One dose of 0.5 ml by sub-cutaneous route only (at the base of the neck). Chickens (future laying and future breeding hens): First injection at 6 weeks. Booster: 4 weeks later. Ducks: First injection at 3 weeks. Booster: 3 weeks later. Turkeys: First injection at 6 weeks. Booster: 4 weeks later. Advice on correct administration: Before administration, allow the vaccine to warm to room temperature and shake well. Administer under aseptic conditions. Inject at the base of the neck. The use of a closed multi-dose injection system is recommended for administration of the product to minimise the risk of contamination. Any unused product must be discarded within 3 hours of broaching.