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It is hard to see in that position as they naturally hunch their backs when sitting like that, I don't think she would sleep in the coconut if it was doing her actual harm but you could always give her a cardboard box house if you are concerned & don't have anything else.
How old is she? Hams can look a bit more hunched as they age but in a younger ham they only tend to look really hunched when unwell, that would be a noticeable change from what's normal for her though if it was the case.