Give your rabbit unlimited hay of good quality. A rabbit should be able to eat as much hay as it wants, 24 hours a day. Roughage contains fibre and this is important for good digestion and intestinal function. Quality hay is great for their teeth, digestion and keeps them occupied. Cut, fresh grass should be avoided as it ferments quickly and can cause digestive disorders. If a rabbit does not get enough roughage, it can have problems with its intestinal system.