No I said (in a round about way) "you can if you want to" LOL I don't one reason is I have literally hundreds of fowl here some I hardly ever see much less could catch. If you can't do all of them why bother you're not ridding/eliminating the entire place of it anyway, which is hard to do with wildlife bringing the stuff in every waking moment of the day. You have to do so every year too(annually) and my main reason is you will never ever will have immunity built up in a flock if you give them a shot every year. I prefer my flock to build natural immunity to every thing they may/WILL come into contact with. Folks don't realize what they bring in just from a trip to the feed store beside the wild birds that cover areas of miles and are in contact with the whole wide world.
Most breeders medicine cabinets contents consist of: a container of louse/mite powder and a hatchet. Mine, I do go so far as to have meds for coccidiosis for the youngun's here and do de-worm twice yearly at spring and fall. The rest is just good feed practices(routine/schedule), clean water daily, high vigor/healthy genetics in the flock. Only the strong survive just like they did a hundred years ago or out in the world Mother Nature provides them(survival of the fittest/natural selection) I don't have time to baby sit the weak or feeble .Must be able to stand on their own two feet here. Like breeds like!
good day all
Jeff