I really hope she will be OK
Given what happened with Thor and was there not another BH from the same line that did not make it :?
I think it would be advisable to speak with Christobel re the possibility that these Hares have a genetic condition called Dysautonomia. BHs are a breed known to be at risk. This condition effects the nerve supply to the guts and stops the guts working properly. Horses can suffer from a similar condition, usually refered to as 'Grass Sickness'.
If there is any risk what-so-ever that Thorne's breeding line carries the 'faulty genes' then I personally dont think it would be fare to risk breeding from her.
I am sure Christobel will be able to offer you good advice.
Sending get well vibes for Thorne