The present invention pertains to the field of liquid feed, and relates to fermented feed products, methods for their preparation, as well as uses thereof. Furthermore, the invention further relates to animal liquid feed and methods of preparing liquid feed using lactic acid bacteria. In particular, a method of preparing a fermented mixed feed is provided, comprising the steps of: (a) providing a liquid fermented product； (b) providing a feed product to be fermented； (c) combining the products from step (a) and Po. (b), and fermenting the feed product of step (b) using the liquid fermented product of step (a) as inoculum.
