My friends two provinces over recently tried to start a wild sourdough starter. It sounded like it was off to a great start, then the report was that it started to get liquidy, then look funny, then it got STINKY. Poor sourdough. My diagnosis was that it was so vigorous given the very strong fresh-milled flour they were using that it needed to eat more than once-per-day, which is what the instructions they were following dictated. Becuase it was ‘starving’ it succumbed to bad microbes which caused it to rot.
Sourdough starter needs to be kept in a “fed” state or the “good” bacteria and yeasts that define a sourdough culture cannot keep invaders at bay and the mix will turn bad. An active culture kept at room temp needs to be fed once per day, but sometimes it can be more often depending on some variables. One kept most of the time in the ‘fridge can be fed just once per week; The cooler temps slow the metabolism of the bacteria and yeasts and they will work through nutrients more slowly. I’ll add that the ‘discard’ process is important — always discard at least half of the starter and replace with the same amount of fresh flour/water.
I will soon make a post that details how TO care for and bake with a sourdough starter. This is what happens when a starter starves. Sorry to the starter I sacrificed for this experiment — science thanks you!