Hi Jemma - when she was in for her dental did they flush her tear ducts?Most rabbits with dental issues also have blocked tear ducts associated with it as the upper molars apply pressure to the ducts - this would be painful to and cause her to go off her food - usually bunnies with dental issues pick up very quickly and will resume normal eating habits after having their teeth done.If she has runny eyes and it is now going to the other eye it may be soemthing to consider - this can be done conscious they do not need to be anaesthetised.Are you able to get a 2nd opinion fron another vet - are your vets experinced at treating bunnies- just seems nothing further has been done to get to the bottom of her illness and she seems to never have returned to how she was just before she was ill?