I feed Chloe Canidae ALS. She is about a year and a half now and I still am feeding her the puppy portion (3 cups a day) - She is 55 lbs. I haven't dropped her down to the "adult" serving because I can still see all of her ribs. When do you normally drop the amount of food to the adult portion? Also - should I be feeding her more - she has been on the 3 cups a day since she was about 8 months.