I’ll ditto the others… Sun Seed is really not the best brand in general… another brand that is good that may be available at a local petstore is Zupreem: Nature’s Promise Premium Timothy Rabbit food. I use the Oxbow Bunny Basics T (I think the majority of us do) and now they are availale at some petstores (PetSmart included).
You want to stay away from foods that have nuts, seeds, corn, cereal pieces.
from the Oxbow site: http://www.oxbowanimalhealth.com/products/type/fortified_food;jsessionid=090D4E4E3A5A35DE11627F4EB54FA03C.vipa-03
You can tell that it has much more natural ingredients, altho I am no nutrition expert, I think there is less “processed stuff” in there. 
Premium Ingredients
- Timothy Hay = Essential Fiber
- Soy Products = Fiber, Balanced Protein, Healthy Fat
- Wheat = Ideal Carbohydrate and Energy Source
Ingredients
Timothy Grass Meal, Soybean Hulls, Wheat Middlings, Soybean Meal, Cane Molasses, Salt, Limestone, Yeast Culture (Saccharomyces cerevisiae), Vitamin A Acetate, Vitamin D3 Supplement, Vitamin E Supplement (tocopherol), Vitamin C Supplement (Ascorbic Acid), Colloidal Silica, Menadione Sodium Bisulfite Complex (Vitamin K), Riboflavin, Niacin Supplement, Vitamin B12 Supplement, Pantothenic Acid, Biotin, Thiamine, Choline Chloride, DLMethionine, Pyrodoxine Hydrochloride, Folic Acid, Sodium Selenite, Magnesium Sulfate, Ferrous Sulfate, Cobalt Carbonate, Manganese Oxide, Zinc Oxide, Zinc Sulfate, Copper Sulfate, Mineral Oil, Calcium Iodate, Potassium Chloride
Guaranteed Analysis
- Crude Protein min 14.00%
- Crude Fat min 1.50%
- Crude Fiber min 25.00%
- Crude Fiber max 29.00%
- Moisture max 10.00%
- Calcium min 0.35%
- Phosphorus min 0.25%
- Salt min 0.50%
- Salt max 1.00%
- Vitamin A IU/KG 20,000
- Vitamin D IU/KG 880
- Vitamin E IU/KG 140
- Copper mg/kg 20