Re: Balding on one side
You could try switching back to the Chinchilla sand. OR replacing the sand area with substrate and just giving her a sand bath with the chinchilla sand - as long as she still has some sand she shouldn't make too much of a fuss. And see if it improves.
I also think some hamsters can be sensitive to sand and a different sand just may not suit her.
I know Racing Hamster had a number of issues with dwarf hamsters having sand reactions and actually stopped using it.
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