Yes, it will take longer for whole grains to ferment, and your temperature will increase or decrease that time.
My real concern is... if you are ONLY feeding corn and wheat, then your chooks are likely malnourished. They are not that high in protein, around 8 and 14%. If fed at 50/50 then your protein is in the 11% range which is prime for all kinds of behavioral issues like feather picking and eating, decreased laying, and wasting chickens. Not less than 16% protein for light bodied layers like leghorn. And 18% protein is recommended for heavier breeds like Barred Rock or Cochin. I promise if you are feeding that because it's cheap it won't save you in the long run. The whole grains are seriously lacking in some of the vitamins, minerals, and amino acids that are included in a whole ration.

Nope, I don't work for the feed companies.
Sprouting is awesome!!! And I had read that things would sprout in the FF but haven't tried it yet. That's like a double bonus!
It might just be hard to see your bubbles. I find that especially true if the mix is thick. But your whole grains might just be disguising it somehow. Different feeds do have different smells when fermenting. Sounds like you are off to a good start to me!
Its OK I'm not feeding 'ONLY' corn and wheat

... thats just the bought grain side which I'm fermenting ... for the protein and other nutrients I give them cooked, minced meat scraps/offal from my home grown sheep. Liver/lung etc ... that is over 40% protein.
I just don't think meat would be great fermented!
I also give them some root crops as extra to pick at, like giant radish, turnip, fodder beets, but not until after they've had all their real feed. The nutritional profile of the roots (by dry matter) is similar to corn, but they're mostly water still, so I don't overdo those. I might try fermenting them too though!
My mix once fed is:
2 parts wheat
1 part corn
1 part offal meats
(all by volume, as the meat isn't dry, obviously weight wouldn't be appropriate)
Total protein works out at 19%.
Then I also give my kitchen scraps (including crushed shell), and a few chunked roots to pick at afterwards.
Do you think that's OK? Constructive criticism always welcome!
My breed is Buff Sussex, heavy breed.
I've noticed that they seem to prefer the ration with meats than the commercial mix, they eat a little less overall and are better satisfied with that ... often the response to the evening feed is "good grief you want us to eat MORE???"
I fed half/half dry grain and fermented grain this morning ... decided they love it ... so far so good. Smells nice to me. Its probably only half done though from the sound of it, whole grain and its winter ... temperature is about 12C out there.
Read a page on lacto-fermenting that said the feed should be covered with water, to actually stop the air getting at it ... everyone I've seen seems to be keeping it quite dryish and stirring to keep it aerated ... ?? I know any fermentation is good, but which is best?
