VetOne Cyanocobalamin Vitamin B 12 Sterile Solution, 1,000 mcg mL, 100 mL at Tractor Supply Co Rooster Booster Liquid B 12 Plus Vitamin K Chicken Supplement, 16 oz. at Tractor Supply Co Durvet, Vitamin B Complex, High Level, 250 mL Augusta Cooperative Farm Bureau, Inc. Vitamin B 12 Injection, 5,000 mcg mL, 100 mL at Tractor Supply Co B12 vitamin Store Vitamin B12 injectable B Complex 30 ampules Aspen Pet Vita Jec B Complex Fortified Livestock Vitamin Injection, 100 mL at Tractor Supply Co