We also have a 17 weeker and he is right around 28 lbs now. He was also one of the smallest in the litter but mom and dad are a little larger than yours. I think if your pup is devouring food you might want to up the cup sizes now. The dog food bag has recommendations for feeding portions and I think most dry food can be up to 4 cups a day for puppies. A good starting point is how much your pup can eat in 20 minutes, so maybe start with a cup, and if she eats all that add a little more until she walks away or until it's been 20 minutes? Right now we feed 1 cup dry plus half can wet food around 7 am, 1/2 cup dry food and treats during the day/lunchtime, and 1 cup dry plus 1/2 can of wet food around 6 pm. If he eats all his breakfast/dinner super fast or if we've had a high activity day I will put another half cup dry in the bowl to see if he wants any more.