Hi , just got me a 4 1/2 month old female pied that was on f/t hopper mice . She took a live rat pup on 7/09/14 the day after I received her and then she shed/pooped last night 7/18/14 . This morning ,7/19/14 I got her weighed at 119 grams empty. I just fed her this afternoon with another live rat pup. I just wonder if that is an average weight for a 4 month old baby . Appreciate your comments . Thanks .