One of Taronga's adult females Asian elephants takes a well earned lunch break after the elephant keeper talk.
Since (Asian) females can reach 3,000 to 4,000 kg fully grown (Africans are larger), obviously food and plenty of it is needed. They can consume 4 to 8% of their body weight per day, and spend as much as 16 hours per day feeding.
Despite this, elephants are rarely seen as contestants on MasterChef.