Ok so last year before winter we had a bird that had little lite brown colored bugs on it when i moved its wing. i have since saw several different bugs stuff, my husband wants to know if anyone has used sevin's dust (it's what you use in your garden and can use it on chickens)as i wasn't sure if it is safe for pigeon.? i have not seen any this spring, we did add a big area that they can dust themselves with in their home. also, When are you supposed to give the vaccines? What are they? Where do you purchase them?