The jinn eat and drink. Ibn Mas'ood said: "The Messenger of Allaah (peace and blessings of Allaah be upon him) said: 'Someone from among the jinn called me, and I went with him and recited Qur'aan for them.' He took us and showed us the traces of where they had been and the traces of their fires. They asked him for food and he said, 'You can have every bone on which the name of Allaah has been mentioned that comes into your possession, as meat, and all the droppings as food for your animals.' The Prophet (peace and blessings of Allaah be upon him) said, 'So do not use [these things] for cleaning yourselves [after relieving oneself], for they are the food and provision of your brothers.'" (Reported by Muslim, 450).
According to another report: "A delegation of jinn from Naseebeen came to me, and what good jinn they are! They asked me for food and I prayed to Allaah for them, so that they would not pass by bones or droppings, but they would find food on them." (Reported by al-Bukhaari, 3571). The believing jinn may eat any bone on which the name of Allaah has been mentioned, because the Messenger (peace and blessings of Allaah be upon him) did not permit them to have anything on which Allaah's name has not been mentioned - those are for the kuffaar among the jinn.