I have a female who is probably about 9 months old. Last time she was weighed she was 440 grams. She gets 1-2 live mice per week (depends how the previous week went 2 mice per week is too much for her right now). As of yet I have not had any feeding problems *knock on wood*, other than during shed. A few times its taken her a little longer to actually go for the mouse (maybe like 5 min) but she always gets em. And I have no idea what the mice weigh