Fuzzies aren't developed enough to fight back, so they would be safe, but unless you find big ones it is still a bit too small I think. Especially if she is growing.
Hoppers do have teeth, but are quite small critters still and once wrapped tend to not be able to move far enough to reach and bite unless the wrap was poor (maybe 1 in 20 odds in my experience). As I said, being on hand with something to keep its head away is generally plenty for that size rodent to keep injuries from happening.
I am breeding mice and rats and have been doing live feeding with my rescue girl and even at her extremely weak state at the start she was able to subdue them easily.
Here is her initially when I got her 3 months ago... just some perspective. She felt like a limp noodle when held back then.
However, if you are super worried about bites, you can try something else.. a small fuzzy rat of about 10% her weight would be developmentally similar to the mice but weighs more. A live one of these is harmless, but since she has been eating mice she may be a bit confused by it because they smell different. Some have no issues with switching and others are picky, but if possible this may be another thing to try.
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