Ask the vet - Rabbit
What should you feed your rabbit if it stops eating?
Vet at FirstVet answers:
If your rabbit has stopped eating it is likely in a life threatening state. You should seek emergency veterinary care immediately. While waiting for your appointment you can try feeding your rabbit pellets mixed with water. “Critical Care” is the best product available for feeding anorexic rabbits. It consists of a hay-based powder that can be mixed with water, giving it a porridge-like consistency. It is fed through a large syringe. Critical Care is sold at most veterinary clinics and some of the larger pet shops. It is always wise to keep a small package of Critical Care at home in case of emergency. Store it in the freezer.