All adult penguins hunt in more or less the same way; they either catch their prey in the water or they can scrape krill off the underside of the ice. When it comes to feeding their chicks, males and females will take turns.
If a penguin has chicks, it will catch and swallow its food, then “store” it for later to feed to its chicks. Chicks cannot digest food like their parents, therefore, the parents need to convert it into a form that the chicks can eat. There are several ways of doing this; the first way is regurgitation; the second way is the equivalent to “refrigerating” the food; and finally, the third way is a secretion that is made from the digested food.
Regurgitation: This is when a penguin will catch its food and partially digest it, which generally takes a few hours. When the parent reaches it's chick and the food has been partially digested, it will regurgitate this food back up, allowing the chick to eat it directly.
Refrigeration: This method enables penguins to keep food for several days. The parent will swallow the prey whole and store it inside their stomach. The food is kept at body temperature. Inside the stomach there are enzymes which prevent it from digesting.
Penguin “Milk”: Penguins, being birds, don’t have “milk” like mammals do. Instead, they produce this "milk" which is sometimes called crop milk. This is a fatty, high protein food that is developed in their crop, which is a pouch in their throat.