my bp is alittle ove 20" inches and weighs about 170 grams (6oz) and eats one small adult mouse every 5 days. First, i was concerned that shes in bad shape because she was treated very poorly before i bought her, and she seems alittle skinny for her length. The main reason for this post was so someone could tell me when its time to switch to larger prey as the snake grows (such as when the snake weighs x grams switch to a rat or mouse of a certain size). ne help appreciated thnx