I just got back in town (my mom was taking care of my kids and chickens). The ff smells closer to rotten than sour at this point (it went through the alcohol smell stage and the cheesy smell stage and then the sour smell stage). I think it's salvageable, but it does have some mold growth around the sides of the bucket where it sloshed and then didn't stay submerged.
I asked Mom to stir it (and she may have), but she didn't add anything b/c I'd mixed up too big a batch and just figured she could use it down a bit.
Can I correct this batch? I don't want to hurt my layers, but it's a lot of grains to waste...
I figured if the 'bad' bacteria were proliferating, I could swing it back in favor of the beneficial bacteria by adding more and feeding them. Tonight I dumped in a lot of raw acv, added more water (unfortunately it was hose water so it has chlorine), and a few more scoops of food. I wouldn't say it's definitely rotten, but I don't like the smell. How do I know when it's too far gone?