Yes, I plan on calling the Extension office first thing in the morning- I am in a pretty small town and actually saw the director today at the grocery store and almost said something to him then. We don't have a poultry agent at the moment, but I'm gonna start the ball rolling tomorrow to getting testing done.
Everyone local and everything I read online said to treat with oxytetracycline in the water, and that it is effective as a broad spectrum abx on MG, as the label states. So far, the ones showing symptoms are still showing symptoms, after 48 hours on it.
So I'm assuming that it's viral, likely not IB since the eggs appearance hasn't been effected. I gave them lots of fresh herbs from the garden that have anti-viral & anti-microbial properties for good measure. All but one of them seems to be eating and drinking, and ofcourse it's my favorite hen. I tried to force feed her, but that didn't work out well. She's making deep mucusy noises.
It's not a big number of birds- 13 of them, and I've been so careful about not bringing other birds in, and only wearing my 'chicken boots' here and not letting other people go into the chickens run or coop. Hindsight is 20/20. I wish I'd not gotten those other birds, cuz it didn't start til they got here, and the stress of new birds likely set it off, even if it was already here. :-(