Puffle Food was a special food that could be eaten by puffles. It was sold in the Puffle Catalog and could be obtained from Puffle Digging, while only food from the catalog was available to all players. The cheapest and most efficient way to feed your Puffle was to not give it anything if the food bar was not at least in half, but give it one apple if the food bar was between half and 1/4 full, and if that bar was 1/4 full or under, then give it two instead of one.