OK, I just had to jump in here!
First, this is an AWESOME post! I, too, bookmarked it.
Second, I don't understand how some folks can read all the way through and still not understand how and where to apply ivermectin, or what dosage of ANY of these products to use; the instructions were quite clear and you've repeated them many times, very patiently. Thank you for your graciousness.
And ThreeHorses, Queen of all Worms, I'm not worthy! LOL!
I noticed the only mention of a "natural" wormer was pumpkin, and I noticed ThreeHorses said it is not effective for a worm infestation. I agree with that, as I noticed the first worm EVER in the coop, about 6 weeks after I tried the natural routine (dandelion, pumpkin, etc) mentioned in Backyard Poultry a couple of issues ago. My girls would rather go hungry than eat dandelion, I can tell you that!
So my question is, what is your feeling about DE? I've read that DE dessicates insects, and yet the feed I treated with DE had tiny weevils LIVING in the DE powder at the bottom of the container, 3 weeks after I poured it into the water-tight container. It didn't seem to be dessicating them too badly! And I bombed a few cockroaches with a different brand of DE, and they were still running around more than a week later (it was an experiment; I don't keep pet roaches!). And if it's supposed to dessicate them, how in the HECK is it supposed to impact an intestinal parasite, which is in a semi-aqueous environment? I prefer non-chemical approaches to life, but am not averse to using them when the situation warrants. Like others, I am loathe to give up eggs for 4 weeks a year; they provide much of the protein in my diet. I'm very interested to see what you have to say about DE.
Thanks for all the time you've invested in this thread!