It depends on the area, if they have a ton of mice around, they eat as many as they can right? If they have none around, the move to look for some.
Theres also the large gaps of time that they don't eat that people tend to forget about, they may eat 4-5 meals really quickly in a row and not eat for a good two-three months.
I donno, it's really an opinion as we don't really know what goes on in the wild for them. I think a study is in order!