The amount of food you need to feed will also really depend on the type of food you are giving. Even different sources of food from the same brand will require different amounts. Do you purchase your food from a pet food store? Usually the staff is knowledgeable on the brands and various foods. For instance, for Tika, she is now a year, and eats twice a day, but only 1/2 cup at each feeding. Sometimes she will not even finish all that off. Her food is higher in protein during the spring, summer, and fall, because she burns a lot more energy when the weather is nicer, but in the winter the protein is cut back, and she usually eats less. I cannot imagine a puppy eating more than a cup a day though. He may have been gorging on the pomeranians food simply because it was something different, and wasn't his. I would also suggest having regular eating times, to make it easier on you, and on him. But, I am definitely not an expert! This is just based on my experiences with Tika. She surely would never allow herself to starve to death. She likes to eat!