Hi folks, My flock is small and half adult birds, half juveniles. I have one rooster, one adult hen, 2 adult guinea hens, and four juveniles. I've heard about potential antimicrobial properties of oregano for chickens, but I'm wondering how to people give their birds oregano effectively? Is putting the dried herb into their feed enough? Or is that a waste of time/money? How will I know if it's effective? Thanks!