Cat food is specially designed food that for the diet of cats. They have specific requirements for their dietary nutrients
including many vitamins and amino acids, are degraded by the temperatures, pressures and chemical treatments used during manufacture, and hence must be added after manufacture to avoid nutritional deficiency.
These foods are found in dry treats or meat.
So can chinchillas eat cat food at all?
Unfortunately they can’t all. Chinchillas have specific dietary requirements that are completely different from cats and they will not like their food at all. They cannot eat animal foods at all and so it isn’t worth feeding them with it.