I used Manna Pro at one point and time it works for some breeds and improves the coat but when I got into English Angoras It didn't do the same so I switched to Purina Show and It works for all the rabbits.
My E. Angora went on a 'hunger strike' what I did was take yogurt and I took a syringe and force fed her until she started to eat again try feeding her fresh pineapple to.