Well that mint soft sorbent and the flower scented stuff are bad for small animals especially rats. The smells are too strong and can bother their respiratory system. So thats not a very good option.

I know most people use yesterdays new cat litter for their rats litter boxs. You coudl buy a small bag to try that.

I honestly have no clue as to why she would be eating it but maybe she won't like the yesterdays news.