I have a 16week old choc lab. We had a check up at the vets a couple days ago and the vet said my dog is overweight. I do exercise her regularly. i have been feeding 4 health puppy formula. The back of the package says to feed 4-5 cups when the dog is between 30-40lbs. My pup is currently 38. So the vet recommenced i drop it to about 3 cups a day. So i did. my big question is how do i know if im feeding the right amount or over feeding? Since she is a puppy she will naturally grow so at what point should i up the amount i feed her? I feed twice a day, 1.5 cups each time.