I made an error somewhere along the line over the past 4 days... I've been making stock. I made a batch each day, straining and pouring it into a food grade 5 gallon bucket stored in the garage fridge. Today I added the last batch to fill the bucket and then I was going to freeze it all in gallon zip bags. I wanted to mix each batch together for a consistent flavor and nutrient profile, especially because the great roasted flavors are in the first batch and the last batch is richest in calcium because the bones are well broken down by then. Anyway, it was a I poured the last batch into the bucket that I noticed an odd odor. It wasn't necessarily awful, and it was familiar. It smelled like a yeast culture I had made before for a prolong source of CO2 for a planted aquarium I had (different story in which I was happy to have yeast). I also then noticed foam forming as I poured. Somehow yeast or something similar was introduced to the bucket of stock(probably from the air) and it flourished in the nutrient rich liquid. I dumped the bucket and sure enough I found a bubbly pancake (yeast bloom) at the bottom. 4 days of making stock from the backs and scraps of 10 turkeys all gone down the drain.