Some take it, but I think the majority probably won't.
I usually offer a live rat pup and leave it in their cage overnight. I just fed my last clutch of 7 a live pup each. Two of them ate within 15 minutes, and the rest of them ate during the night.
Sure hope you mean rat fuzzy. Most rat pups are 20-29 grams in weight and well thats huge for first meal. Large pinky rats or small fuzzy rats is good for first few meals or live mouse hopper.