If she strikes and constricts it, she wants to eat it. I've never had one strike, constrict, let go, and not eat it. My het pied girls will drop the rat if I look at them cross eyed, but once I push their tub back and leave, they always pick it up and eat it later. Once she constricts leave the room, shut of the lights, and don't check on her for several hours. Just give her some peace and quiet. As long as the rat is about the same size as she is around, there is no reason she can't eat it.