My puppy Galen was like a vacuum cleaner up until around 7 months. He tapered off a bit for a while and then got very hungry again around a year. He slowed down again around 15 months. He was always a skinny boy; now he is at a good weight. Our newest puppy Ritter also had a hearty appetite, but he wasn't quite as intense about it as Galen. He was also a chubby boy and remains comfortably well padded at almost a year. He seems to be a competitive eater; I suspect I will need to watch his weight in the future. I'm currently feeding the pair 3 small kibble meals a day, plus I fill a couple of Kong Wobblers for them. They won't work the Wobblers unless they are hungry, so using them is a way to ensure Galen gets the extra calories he needs without Ritter and my greedy cat turning into blimps.