Everybody seems to think that my concern is the size of her food, but it isn't!!
I mentioned that that is the smallest I have fed her since I got her, everything else has been bigger. Unfortunately, that was the only thing the place I go to get her food had. I'm well aware of what size her food should be and that's exactly what I've been feeding her. It's just this one time that was different. My concern was why she wasn't constricting but now I know that the mouse was too small.