Why is your rabbit not eating or drinking and barely moving and it has no diarrhoea?

Your rabbit probably is suffering from ketosis. Try giving your rabbit a high sugar, high energy treat. Raisins, sunflower kernels, orange wedge, piece of banana. Also try putting something in their water tom get them to drink. If you don't have electrolytes put some jello in and make sure it dissolves. If they still don't eat or drink consult a vet.