If she's new and hasn't taken a dump for you yet. then don't feed her right away. take it slow until she goes. I would feed her smaller than normal until she goes. a snake won't eat for months and then start. keepers make the mistake on feeding too much too fast. I have a female spider that a 1 year of age was over 1500 grams. I offer food to my snakes often and I get them to size fast . but I won't slam a snake with food until I know her digestive track is working and normal.