I agree with MM that moulting most likely aggravates a preexisting condition. I didn't convey that very well.
Proper diet and exercise was my method, though I wasn't always successful with either. Keeping up on Mimzy's dentals was key, but with all three of them-and especially Pip, perhaps being a doe made a difference-I had to keep their coats free of excess fluff. They'd swallow way too much of it. But then I know bunnies who'll eat carpet during gut slowdown, probably a signal that they're looking for extra fiber.
Less processed food beyond required amounts of hay. And sometimes the type of hay made a difference. Oat hay worked better for Pip to keep her regular during moult but Fiver would get stuffed full and it actually sent him to hospital upon eating it.
Reducing brassicas and other gassy treats was a big plus and particular to each bunny (Fiver would get wind from romaine lettuce but the others ate it fine.)
Also fluids are essential. No creature on earth can digest effectively without hydration levels at optimum.
I just saw your last post. Something to keep in mind is that it can take a bunny gut weeks to completely normalize from one stasis episode. If they seem to be repeated closely together she may not have totally recovered from the earlier illness. Complicated little tummies these bunnies have! :roll:
I hope the diagnostics can give a better picture of what might be going on. Lots of healing vibes on the way for beautiful Millie.
xxxxxxx