Redbarn Bully Springs- Odor FreeCrafted from grass fed, free range cattle, this single ingredient dog chew is treated with a unique natural process to eliminate odor. It supports both muscle growth and dental health, while also keeping your dog engaged and alleviating boredom. Ingredients Beef Pizzle. Guaranteed Analysis Crude Protein (min): 80% Crude Fat (min): 1% Crude Fiber (max): 1% Moisture (max): 15% Calcium (min): 0. 8% Phosphorus (min): 0. 4%