One of my snakes wont eat.

Alright, I'll try again next friday! Can I put a small mouse in then follow it with a rat pup?

Try with the Rat pup first, then is she refuses try the mouse the next day. are you feeding at night ?

Where do you buy your rodents? I found with one of my picky eaters, when I was feeding her live rat pups that were 10% of her weight (so ~30 grams), she would be too afraid to strike for some reason. She won't eat frozen so thats not an option. So Ive found that if I want her to eat, I have to give her live pups that are closer to 20 grams, so that she isnt so intimidated by it.

My best suggestion is to bring a scale to wherever you buy rats and find one that is as close to 10% of your snake's weight as possible.