OPTIBALANCETM is our combination of nutrients. This dry complete dog food has been specially formulated in a more effective way for dogs to absorb the nutrients they need from their dry food. PURINA PRO PLAN with OPTIBALANCETM is a combination of specifically selected ingredients, nutrients at appropriate levels for dogs of different sizes and physiques. This formula has been designed just for the needs of small and mini adult dogs. OPTIBALANCETM is made with quality pieces of chicken and includes Vit. D and other key nutrients, to deliver high nutritional performance and help to promote adult dogs' overall health PURINA Pro Plan Small & Mini Adult with OPTIBALANCETM is a complete dry dog food for small and mini adult dogs that includes a combination of key nutrients that helps support healthy joints for their active lifestyle. The specifically adapted nutrient concentration also supports the faster metabolism of small dogs. Our recipe has been specially formulated to help them m