Instruction: Extract the value of the target attribute from the given product information and output it along with the corresponding source.

Input:
Product title: Performatrin Ultra Grain Free Small Bite Recipe Adult Dry Dog Food 13.2 lb.
Product description: Performatrin Ultra Grain-Free Small Bite Recipe Dog Food embraces holistic pet nutrition, focusing on functional, whole foods. This recipe goes beyond meeting your dog's daily requirements, promoting your dog's whole body health and wellness. 85% of protein is from a unique blend of Turkey, Salmon and Duck is irresistible to your dog's carnivorous palate.
Product feature: 100% Grain-Free, Perfect for all life stages, Omega-3 & 6 to support healthy skin & coat, DHA for cognitive development, Rich in nutrients and vitamins
Product brand: Performatrin
Target attributes: Life Stage
Answer: attribute: life stage
value: adult
source: product title