Rat pups should be fine. Even though rat pups have a range of sizes depending on who you're talking to (a rat pup for one dealer could be smaller/larger than a rat pup for another dealer), try to feed her rat pups in the 14-25g range. Basically, feed her the smaller pups in the bag first. If they are really small pups, you can feed two at a time to equal that weight or you can feed her more often (every 4-5 days). Whatever fits you and your BP better. Some BPs won't take multiple prey items so you'll just have to figure out what she likes.