Extend - Superfood for Dogs - 2 bottle Special - Antioxidant Supplement - 100% Antioxidants help promote immune health and vitality. Contains an all natural formula that nourishes, heals, and protects your dog from the inside out. Omega-3 and-6 fatty acids help support skin and coat health. 100% Pure Grade Ingredients Prebiotics and probiotics help maintain digestive function.