Well I'm kind of a halfway between the two main approaches here!
I don't have chipmunks here but I do have birds that eat grain in the day and rats or mice that take it at night.
So I give them a big feed in the morning, as early as possible (I get up, boil the kettle while mixing feed, and take my coffee out to the chickens!). This comprises "1 scoop" of fermented whole grain, and a cup or a bit more of chopped cooked meats, plus kitchen scraps.
They fill up on that and leave just a little wheat sitting around for another hour or two. Enough to indicate they are more than happy, not enough to attract pests. They remain well satisfied all day, regardless of whether they free range that day or not.
In the evening, half to one hour before their bedtime, I take out fermented grains again, and feed to appetite ... perhaps half a scoop, but perhaps they won't even finish a handful. I know pretty quickly ... either they act hungry or not. Usually it is 1/4 scoop. I want them to eat as much as possible (I have a theory a well fed evening chicken lays better the next morning), but not leave any.
I don't have chipmunks here but I do have birds that eat grain in the day and rats or mice that take it at night.
So I give them a big feed in the morning, as early as possible (I get up, boil the kettle while mixing feed, and take my coffee out to the chickens!). This comprises "1 scoop" of fermented whole grain, and a cup or a bit more of chopped cooked meats, plus kitchen scraps.
They fill up on that and leave just a little wheat sitting around for another hour or two. Enough to indicate they are more than happy, not enough to attract pests. They remain well satisfied all day, regardless of whether they free range that day or not.
In the evening, half to one hour before their bedtime, I take out fermented grains again, and feed to appetite ... perhaps half a scoop, but perhaps they won't even finish a handful. I know pretty quickly ... either they act hungry or not. Usually it is 1/4 scoop. I want them to eat as much as possible (I have a theory a well fed evening chicken lays better the next morning), but not leave any.

