I have two 07 balls, and my girl won't eat rats, even if they are the same size as a mouse. I have never had a problem feeding her, even switching from live to f/t. When I figured out she won't eat rats, I got worried, but everyone on here said it's fine, just feed more. I was also told that if you feel like you are feeding too much at one time, feed twice a week. I'm not an expert, these are my first snakes, but it seams reasonable enough to me.