I looked up the ingredients:
Ground wheat, ground corn, corn gluten meal, wheat middlings, soybean oil, calcium carbonate, dicalcium phosphate, brewers dried yeast, L-lysine, iodized salt, magnesium oxide, choline chloride, DL-methionine, calcium propionate, L-tryptophan, vitamin E acetate, menadione sodium bisulfite complex (source of vitamin K activity), manganous oxide, ferrous sulfate, zinc oxide, niacin, calcium pantothenate, copper sulfate, pyridoxine hydrochloride, riboflavin, thiamin mononitrate, vitamin A acetate, calcium iodate, vitamin B12 supplement, chromium potassium sulfate, folic acid, biotin, vitamin D3 supplement, cobalt carbonate
Basically these are in no way suitable for chinchillas. The fiber is way too low and the first group of ingredients (wheat and corn) cause major issues like stasis in chins. Stick to chin pellets.
For comparison, here are Oxbow's chinchilla pellets:
Alfalfa Meal, Soybean Hulls, Wheat Middlings, Soybean Meal, Limestone, Salt, L-ascorbyl-2-Polyphosphate (Vitamin C), Cane Molasses, Yeast Culture (Saccharomyces cerevisiae), Vitamin A Acetate, Vitamin D3 Supplement, Vitamin E Supplement (tocopherol), Ascorbic Acid, Colloidal Silica, Menadione Sodium Bisulfite Complex (Vitamin K), Riboflavin, Niacin Supplement, Vitamin B12 Supplement, Pantothenic Acid, Biotin, Thiamine, Choline Chloride, DL-Methionine, Pyrodoxine Hydrochloride, Folic Acid, Sodium Selenite, Magnesium Sulfate, Ferrous Sulfate, Cobalt Carbonate, Manganese Oxide, Zinc Oxide, Zinc Sulfate, Copper Sulfate, Mineral Oil, Calcium Iodate
They need a base diet of hay, and the fiber in the Teklad pellets is so low as to be non-existant.
We are as gods to the beasts of the fields. We order the time o' their birth and the time o' their death. Between times, we ha' a duty. - Terry Pratchett.
"Men have forgotten this truth", said the fox, "But you must not forget it. You become responsible, forever, for what you have tamed. - Antoine de Saint-Exupéry