Walker is only 12 weeks old and weighs about 5 pounds but easily eats 3/4 cup a day. If we go on more then one long walk a day, he will beg for food after his usual dinner and chow that down to bring his sum total to about a cup. I know that its higher than the recommendations generally, but his ribs are still fine and he stops eating when hes no longer hungry so I'm not about to starve him.