Short answer: KNF (Korean Natural Farming) chicken feed is regular poultry feed that is soaked and fermented with a microbial starter, usually a lactic acid bacteria serum or a similar culture, for a couple of days before it is fed wet. It is cheap and easy, but the benefits are modest and it needs clean handling.
What KNF feed is
Korean Natural Farming is a low-input approach that uses homemade microbial cultures. Applied to poultry, the idea is to ferment the flock’s normal feed so lactic acid bacteria multiply and the mix turns slightly sour. This is closely related to the ordinary fermented feed many keepers make with just feed and water. Our guide to adding supplements to chicken feed covers other ways to boost a ration.
What you need
You need a complete chicken feed (crumble, pellet or whole grain), clean non-metal containers such as food-grade buckets, a lactic acid bacteria culture or a spoonful of an earlier batch, and water. Chlorinated tap water can slow fermentation, so let it sit out uncovered for a day or use filtered water.
How to make it
Put the feed in a bucket and add enough water to cover it by an inch or two. Stir in the culture, cover loosely so gas can escape, and keep it at room temperature. Stir once or twice a day. After about two to three days it should smell pleasantly sour, like yogurt or sourdough, and show small bubbles. Strain off extra liquid, which you can save as a starter for the next batch, and feed the wet mash.
How to tell it is working
Good fermented feed is tangy and slightly bubbly. Throw it out if it smells rotten, looks slimy, or shows fuzzy mold in colors such as green, black or pink. Wash the bucket well between batches.
What it may do for your hens
Studies on fermented feed in poultry report lower feed pH, more lactic acid bacteria, and in some trials better feed conversion or less wastage. Results vary by recipe and flock, and the effect on egg quality is not consistent, so treat egg-quality claims with caution. Many keepers also like that wet feed is more palatable and reduces dust.
Feeding tips
Start with a small amount mixed into the regular ration and increase it over a week so birds adjust. Feed only what the flock will finish in about 20 to 30 minutes, and remove leftovers, especially in warm weather. Fermented feed does not replace grit, clean water or a calcium source for layers. For a related approach, see our notes on fermenting duck feed.
A note on the soil claims
You may read that KNF methods improve soil. That refers to the garden practice of applying microbial cultures to soil and plants and is a separate topic from feeding hens. Used compost from a flock fed fermented feed is not proven to be better than regular compost.
Health and safety
Wash your hands after handling wet feed and buckets. If birds develop diarrhea, stop eating or seem lethargic after a feed change, go back to dry feed and talk to a veterinarian who treats poultry. This is general information, not veterinary advice.
Bottom Line
KNF-style fermented feed is a low-cost way to make a complete ration more palatable and to add beneficial bacteria. Keep it clean, feed small amounts, and do not expect miracles for egg quality. If it ever smells rotten or moldy, discard it. For other feeding ideas, read what belongs on your chicken feeding list.
