Just wanted to stop in and say what I decided to do with the random meat bird that had gleet. I decided to go ahead and treat him, not because he has any real value but because in the future I may have a bird of value that I'd like to treat and wanted to use this guy as my guinea pig. Any way, I didn't have any Nustock (but got my local feed store to order it) so I used this stuff,
Shapley's MTG Plus, instead that I use on my horses it's sulfer based, made up a new batch of fermented feed and upped the ACV in the water, separated him, and 3 days later he looks like nothing was ever wrong. Kept him in for 2 more days just to be sure, marked him so I would be sure he was out of the running in the "last rooster standing contest" and if I hadn't marked him I wouldn't be able to tell you who he was.
I have no clue which of the 3 things "cured" him but now everyone is on FF every day (though they also have free access to crumble because I have no clue how much to actually feed them and they are only 5 weeks old), and I have now made up batches of ADV with mother still intact.
Thanks for the input and help.