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I'm not sure what the actual problem is, I do agree with souffle that the meds do sound strange for a ham, she should be getting plenty of fibre with Harry Hamster as her main mix they do need a reasonable amount but not too much so the mix plus some fresh veg (only a little) is usually enough.
I would go easy on the treats until she's better, stick to plain mix & maybe a few extra seeds, the oat bites are ok but I wouldn't give fruit at this stage.
Have you tried giving any probiotics? That might help with any digestive issues she may have & even if there is something else going on it would still give her a boost.
In the UK most people use ProC which is available from a lot of pet shops & online.