The present invention relates to a pet dog food for a diet, capable of preventing most side effects and effectively reducing the weight of a pet dog by mixing cheonggukjang powder, lactobacillus powder, and grain powder as well as preventing the unique smell of cheonggukjang from leaking to the outside while improving its taste to enable the pet dog, which is very sensitive to smell, to eat the feed. According to the present invention, the pet dog feed includes: a core formed into a pellet shape by mixing stomach soluble film-coated cheonggukjang powder, intestine soluble film-coated lactobacillus brevis powder, oyster mushroom powder, fermented barley powder, chicken powder, and other additives with gelatin; an inner coating film coating the outer surface of the core and made by mixing glycerin, sunflower oil, and lecithin with dextrin and protein powder which are extracted from white kidney beans; and an outer coating film coating the outer surface of the inner coating film.
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