when you mentioned wet conditions I couldn't help but think of coccidiosis.
I'm pretty sure that's what I'm dealing with. I use a medicated feed, but when it gets this hot it doesn't seem to be enough, so I add Corid to their water every couple of days. But the last 2 weeks have been extreme - while "official" rain totals from this system are much lower, my vet recorded 17 inches at her clinic, and that was Monday, the rain didn't stop until yesterday. Sounds about right to me. I don't have a rain gauge but I forgot a 5 gallon bucket in the pen and it was full by the next night. And it hasn't been continuous rain, blazing hot sun through the day with torrential downpours at night, so it's like a sauna. Or a giant incubator, with my pens as the petri dishes...
John: I keep hearing about Oxine, I need to get some. Don't know if it will help in this case, just trying to cover all the bases, in case I have something more than coccidiosis going on.
Did I mention I loath summer...