I don't know if it's just my asf's or all are like this, but no matter how big their teeth are, or how mean they are they don't break the skin.
I've got one girl who I named "Dirty Sanchez" because she stands up on her back legs, and dances around before she charges, and bites me any time I put my hand in her tub. She's down right evil! But she's never been able to break the skin.
On the other hand I've been bitten by standard rats and I might has well been sliced by a butcher knife. My wife took a bite on the finger, and sliced her to the bone all the way across the pad of her finger.
So are all asf's safer than standard rat bites or just mine? If you don't know please go to your meanest asf tub, and let it bite your finger. Let me know...