Most puppy foods(and foods in general) have feeding guidlines on the bag. You match up the weight(25 lbs?) to his age in weeks on the chart and it will tell you how much(total) to feed a day that will meet his caloric needs. You can feed half in the morning and half in the evening, all at once, or 3 times a day. That is just personal preference and how you think your dog will eat the best. Hope this helps.