I have an 11 month old border collie/chocolate lab mix who eats dry puppy food. She's about 30 lbs. Lately though, she's started to gain weight, despite the fact that she's a pretty active dog. She lives with my parents and goes running with my mom on a pretty daily basis, and plays with other neighborhood dogs. It seems to me like the puppy food has too much fat content and I should start her on adult dog food. Any expert/experienced advice?