Might have just been a fluke. Can you define "fuzzy" mouse? Like, is this an adult mouse?
Have you thought of converting over to frozen/thawed rats instead? That way you only have to feed one.
You don't need to take him out of his home enclosure, but for next time maybe you can remove some of the cage furniture so the mouse has less places to hide and he can get a better strike the first time.
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