This method for producing pet food resulting from mixing at least two colors of food granules is characterized by having a food granule production step for producing at least two colors of food granules and a mixing step for mixing the at least two colors of food granules, the food granule production step having a powder starting material mixing step, which obtains a mixed powder by mixing powder starting materials, an extruded granule production step, which continuously produces food granules by supplying the mixed powder to an extruded granule production device, and a coloring step, which adds an additive liquid containing a coloring component into the extruded granule production device, and the mixing step having a step for sequentially introducing the at least two colors of food granules into a tank, layering same, and a step for obtaining a mixture of the at least two colors of food granules by discharging the food granules from the bottom of the tank.
