Poor you guys. I'm sorry Dumpling is not very well, but, given we can't change those circumstances, I'm so truly glad she is with you. Every decision you make is based on 'what is best for the bunny', and she is so lucky to be surrounded by that love. As you always say, its quality over quantity. It must break your hearts, but not hers, she is very lucky.
I hope that for the rest of today and tomorrow and until her vets appointment on Saturday, you and her can have some lovely times together to make her time the best possible and also to give you guys some lovely memories.