Absolutely not for a chinchilla. I have NO idea about rabbits' needs, so can't speak to that.
From the website:
Kaytee Healthy Bits provide the crunchy, nutritious morsels small animals crave, combined with the essential nutrients they need, into a fun-to-eat crunchy treat. Wholesome ingredients such as, honey, molasses, papaya, carrot, apple, sunflower, and unique seeds, combined with essential nutrients, will delight your small animal and promote good health.
Ingredients:
Oats, Dehydrated Alfalfa Meal, Cracked Corn, Milo, Oat Groats, Sunflower Hearts, Peanuts, Wheat, Ground Oats, Ground Wheat, Dehulled Soybean Meal, Canadian Field Peas, Gelatin, Dried Papaya, Dehydrated Carrots, Honey, Corn Sugar, Ground Corn, Dicalcium Phosphate, Calcium Carbonate, Dehydrated Apples, Cane Molasses, Corn Oil, Salt, Dried Whey, L-Ascorbyl-2-Polyphosphate, Yucca Schidigera Extract, Vitamin A Supplement, Choline Chloride, DL-Methionine, Ferrous Carbonate, Manganous Oxide, Zinc Oxide, Riboflavin Supplement, Vitamin B12 Supplement, Vitamin E Supplement, Ethoxyquin (a preservative), Copper Sulfate, Niacin, Menadione Sodium Bisulfite Complex (source of vitamin K activity), Cholecalciferol (source of vitamin D3), Calcium Pantothenate, Pyridoxine Hydrochloride, Thiamine Mononitrate, Calcium Iodate, Biotin, Folic Acid, Dried A. oryzae Fermentation Extract, Dried Bacillus coagulans Fermentation Product, Dried Bacillus licheniformis Fermentation Product, Dried Bacillus subtilis Fermentation Product, Cobalt Carbonate, Sodium Selenite.
Guaranteed Analysis:
Crude Protein (min.).......16.0%
Crude Fat (min.)............5.0%
Crude Fiber (max.).........15.0%
Moisture (max.)............12.0%