I just sprinkle some in a bucket of food shake it up and feed. I put DE in the coop everytime I clean or freshen it out, also put it in their favorite dust bathing spots along with some sevin dust for mite control.Thanks SOS, I feel a bit silly..I remember now what ACV is. This is great info..thanks! I have to admitt. I really thought that the ACV would do the trick if my birds ever got infestation. Thankfully, hasn't happened. I have DE, now I have to ask, how do you use it in the food? Of course I'm using it on them a few times a year, and in the nest boxes..but food? I always wondered about the eating part because, I heard that once it gets wet, it doesn't work..of course meaning, wet for the mites/lice..but what about for internal help? It gets wet!