8 REASONS WHY VACCINES AREN’T A PRACTICAL OPTION FOR BLOCK FLOCKS
• Most of the vaccines need to be stored in liquid nitrogen containers until thawed for use.
• There is a freeze-dried product which can be stored in the fridge but this may be less effective.
• The vaccine is usually in 1000dose vials.
• The vaccine must be mixed with a diluent and once mixed it must be used within two hours.
• Vaccines must be used an oneday-old chicks before any contact with other poultry is made.
• The vaccine is administered at 0.2ml in the skin on the neck.
• All commercially-bred laying pullets (Hyline and Shaver Browns) are vaccinated at oneday-old before they leave the hatchery.
• Chicks which have been vaccinated (and this applies to all vaccinated chicks bought from commercial hatcheries) must be kept away from other poultry or possible contamination from dust or feather dander from older poultry for a minimum period of two weeks and preferably six weeks, to allow immunity to develop.