Congrats on the baby, Trish! Its just darling.
I am the one that uses oregano for my birds, its especially good for coccidiosis. Good antibiotic too.
You have to add a little olive oil or any other carrier oil. I can answer questions, but depends on what you are using it for.
Sorry to hear of your losses on your birdies.
that just sucks.
Danz, if you are feeding mass birds, I have heard of a powder you can add to their feed, I believe pigeon folks swear by it. I will have to look it up but its oregano powder. Ropa something I think but I think there are cheaper forms of it.
I haven't used it personally, but the guy on the pea thread from Germany uses it because over there they have banned chemicals. I have thought of adding it to water but since oil and water don't mix well I wonder how well it disperses? Some chickens getting a good dose and others Nada, I mean? The one getting the good dose will be shaking her head and saying "Yuck!"