I've heard a lot of different recommendations about what a ferret should be fed.
Ferrets are carnivorous animals, meaning they are strictly meat eaters.
In addition, they are characterized by an extremely high metabolic rate. The food that they consume is burned and the nutritional components used very rapidly. Therefore, regardless of age, ferrets should have constant access to food. They eat about 10 small meals over 24 hours. Ingested food is eliminated in 4 hours.