The main food of pure black chinchillas is generally grains, grass powder and various trace elements that are crushed and weighed as granular food, which meets the nutritional needs of pure black chinchillas. It can be used in conjunction with pasture. Common pasture varieties include alfalfa and timothy grass.

Alfalfa is rich in protein and calcium, which is unmatched by other forages, while Timothy grass has a high crude fiber content high. You can also feed it some snacks occasionally, but not too much.