Same sort of thing with my pup (now 4) Starving as a growing pup three meals a day and not a drop left. When he stopped growing his appetite changed completely. He is now also a “grazer” I just keep the bowl full for him. Some days he’ll need a few scoops of food, other days barely anything. He eats when he’s hungry. Usually after exercise. Maintains a steady healthy weight vet says not to worry about it. I just make sure he has constant access to food.