Hi there,
sorry to hear about your rabbit.
I would advise against giving any sugar/glucose by mouth as this will actually worsen the diarrhoea,despite what a a lot of people think.
I would give Kaolin & Morphine 3-4 times daily via syringe if you have one, (for your average adult rabbit size i would say around 0.6ml- 1.0ml)
Withhold all veg, just offer hay & persevere with the recovery diet only, in conjunction with the Kaolin, asthe Kaoilin should firm the rabbit up again. Also make sure you syringe water into his/her mouth, little & often to prevent dehydration.
Probiotic would be a good idea in the water that you syringe.