Hi,
I’m sorry to hear you’re in this difficult situation! I’m glad Misty is happier. I think you were definitely right to separate them – it’s not fair to leave one bunny being bullied. It sounds like Daisy has taken the separation badly though. Despite her bullying, she must have still felt bonded to Misty.
Can they still see each other? I think having their hutches close by, but not close enough to touch each other will help Daisy. You can also try and spend more time with her. It’s really important that Daisy keeps eating though, so do keep encouraging her with anything. If rabbits stop eating, they can go into GI stasis, which is a serious condition.
Also a side note, since you say she’s eaten one bowl of food – do they get hay? Hay should be 90% of a rabbit’s diet, then they should get a small portion of pellets based on weigh (1/4-1/2 a cup per 6lb bunny – my 1kg bunnies get roughly a tablespoon each a day), plus some fresh leafy veg every day.
If she’s still eating hay, but not pellets, then I wouldn’t be too worried, but if the only thing she’s eaten since Thursday is one bowl of food, I would be very concerned. Is she pooping?