Many vaccines and antibiotics need to be applied to various types of birds at very specific droplet sizes. Suitable applicators need to be able to deliver droplets of a pre-selected size with few or none of the droplets outside of the specified range. The Dyna-Fog® Hurricane, Dyna-Fog® Cyclone, and Dyna-Fog® TWISTER XL3™ are ideal for this use and as a convenient and simple method of application on birds such as Broilers, Breeders or Turkeys loose on the floor and can also be used for small numbers of caged birds.