Yes, puppy food will cause weight gain if you are feeding via quantity in lieu of caloric intake. For example, say you ordinarily feed your dog a can of adult grade chow and a cup of adult grade kibble. If you keep the quantity the same, but switch to puppy grade, it will increase your animal’s caloric intake, as puppy food is higher in calories, and your animal will gain more weight. Puppy food in itself will not cause weight gain IF you feed via caloric intake. It’s about quality and not quantity. If you wish to feed puppy food, there will be no problems with weight gain if you adjust the caloric feed level to correlate with your animal’s requirements.
