A couple of question about feeding mice

[NennaMeerkat]

So my baby hognose ate again, this time she didn't hesitate when we put the two pinkies in the aquarium with her. Yes they are live, and yes I am feeding her in the home she lives in. Next week, since she ate in front of us without a towel, I will try removing her into a separate container and see how she does.

Anyways, most of you will probably throw eggs and such at me for wanting to continue feeding live but I am. Thus I need to know what is the oldest "stage" of a mouse that I can get my snake when she is older that will not harm her. I cannot remember if it should be a hopper or not. I do plan on trying stunned mice but just in case she doesn't want to eat them for whatever reason I would like to know what the stage that won't be able to hurt her once she is an adult.

The other question I have is how often should I feed my snake a week while she is a baby? With our Corns we used to have years ago we always kinda fed them (once again live) until they would not eat anymore...but I have read in a couple of places that hognose snakes are notorious for overeating and I certainly don't want a fat snake. Right now we feed her 2 pinkies once a week (Thursday or Friday).

If anyone can help me out that would be great.