Luna is 9 now months old and weighs about 18 pounds. She is very active and goes to doggie day care two or three times a week where she runs and plays with other dogs for most of the day. She absolutely LOVES it! The staff there say "Nobody has more fun than Luna." At home, we also spend a lot of time training and running in my yard which is about 3 acres. I've been feeding her 1/2 Cup of Wellness Puppy food twice a day as well as using some of her kibble as rewards during training. I can easily feel her ribs. Of course, since she's a Sheltie, she always acts like she's starving. I wonder if I should be feeding her more? I'm pretty sure she shouldn't get less. Suggestions?