Hi guys-
I have pertinent experience on this one.
I'm pretty obsessive about eating organically. I insisted that everything our chickens got was organic. Our last batch of chicks did just fine.
Yesterday we had a major emergency with a suddenly-sick 8-week-old chick. Spent the ENTIRE day tracking down a vet who would do a fecal test, getting the dx and the meds for her. I really did not think she would make it, she was that sick. These are PETS so of course we had to try to save her; if we were in a farm situation it would probably be different. anyway: the dx was coccidiosis. We'd done everything "right" (I thought): all good organic feed, very clean brooder, exposed them to dirt in the yard several times, etc. But the vet explained that a clean, dry brooder can actually exascerbate the problem. the organism is probably existing in the environment but never to a great enough extent to get the birds to build up immunity. We had one incident occur (they spilled their water two times on hot days last week and I didn't notice and clean up the litter for a few hours) that probably caused a big growth in the cocci population (they thrive in warm/damp) and that probably precipitated the event.
WE're treating the chicks with Sulmet and have been advised by all the vets we spoke with (including the poultry expert at the university) to feed medicated feed for a while, as well. In this case, I'm going to do it. And I will probably feed medicated feed to future chicks as well, for a couple months. it was just too scary seeing Lillith nearly dead like that, like I said they're pets. I am going to hope that the Amprolium in the feed is out of their systems by the time they start laying, and we start eating the eggs.... which just leaves my discomfort at supporting agricultural practices I don't agree with (as far as how the grains are grown in the non-organic feed). Also, yeah, it's probably better livestock management to let the birds w/o immunity succumb, but again, since they're pets, we just can't do it.
So there ya go. I went from insisting on organic only feed to recommending that you feed medicated for a while. Just my 2 cents.
Stacey