Rob, how about putting some interesting roo in with the layers, then you could just incubate your own hybrids? If you throw an easter egger in there, you could make some nice colored eggs.
@ozexpat What do you think, cocci? You probably know available remedies better. I'd go with the natural selection method, and let the ones that build up resistance make up the base of my flock, but I'm guessing some sort of treatment would be preferable in this case.
That must be a tough job... I've been a grumpy caller sometimes too, although I usually try to end the call with apologizing for my behavior and complementing the person at the other end for putting up with me and explaining that my issue is with the company, not the representative.
Some people say fermenting the feed will keep the smell down a bit. What kind of bedding are you using? And getting a proper deep litter going takes some time.