Just an update- she actually ate a rather large rat about a week ago and held it down! She's 486g and she ate an 86g rat! I was a little scared she wouldn't be able to do it but she did great! It was a live, and sometimes they seem to grow after you get them home. You think they're pretty small in the store, get them home, and you're having second thoughts. lol! nevertheless, she's switching to 3 20g mice every 10 days.