Puppies start to nibble solid foods at 3 - 4 weeks of age. Keep moistened Pro Plan available at all times. Allow your puppy to eat at will until fully weaned (6 - 8 weeks). After weaning, Pro Plan can Showing the single result Default sorting Sort by popularity Sort by average rating Sort by latest Sort by price: low to high Sort by price: high to low Sort by editor review Added to wishlistRemoved from wishlist 0 Add to compare Purina Pro Plan High Protein Dry Puppy Food, Chicken and Rice Formula – 18 lb. Bag Added to wishlistRemoved from wishlist 0 Add to compare $52.98 Original price was: $52.98.$50.33Current price is: $50.33. 5%