Instruct: Classify Amazon reviews into positive or negative sentiment
Query: Great for my Sr Dog

My dog is a 16 1/2 year old large breed dog. Last summer her hair got very dry and began to fall out in large quantities. This continued for many months. Two different vets told me it was "grandma hair" from old age and nothing they could do. I decided to try this product on her. 1 tsp over her food daily. She loves the oil and her hair returned to normal within less than a month. We are a year since and still nice shiny coat, plus great for her heart.