Well, this is how I keep all my baby dumerils, and don't have feeding problems. The problem is I have them all in a rack system, so setting up your heat is going to be up to you. I use the small rubbermaid containers in my rack(about .98) and there's heat cable in the back of the rack(Animal Plastics rack). I use newspaper as a substrate and small water bowl. So, I guess same container, small piece of heat tape at one end, and thermostat to maintain temps...rheostat bare minimum. Place the snake in there, leave her alone for a few days, then try to feed her. Just put the mouse in and close the lid. Don't leave a live mouse in there unattended though, be close by if she doesn't eat so you can pull it out, or if it turns into the predator-lol, yank it out! Generally speaking, the smaller the cage set up for baby dumerils, the better. And like you said, leave her alone and let her settle in. I wouldn't even handle her until you have her feeding consistently. She's not going to get mean, and even if she did, it's better she feeds than sits on your lap watching T.V.-LOL! Once she's feeding consistently, you should have no problems. And if you JUST got her on the 14th, your definitely worrying way too soon. Patience grasshopper! LMAO, take care, and by the way, she's a good looking girl!
Paul