I need to understand the science behind fruit upsetting the gut flora...so if someone can give me an outline then I can run at it...so to speak...

Here is a quote from the site link, I haven't read it fully but it seems to cover the topic

Excessive fruit sugars in the diet may contribute to bacterial overgrowth of the tortoise’s gut. Improper gut flora (bacteria) may lead to severe health problems

Care of Desert Tortoises

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Sorry I should have been clearer.....i get it so far...but I need an indepth explanation for what gut flora are present normally...how fruit changes this and how long the imbalance is there for if not corrected...and how to correct it...

Interestingly the article says MAY lead to health problems??