Weevils undoubtedly contain protein. But their outer shell is probably chitin, notoriously indigestible. I have seen cats eat cupfuls of beetles, and then have to regurgitate a revolting bolus of beetle shells. I recall reading that before biting an ancient sea biscuit, the diner knocked the biscuit against the table sharply to
suggest to the weevils that they should exfenestrate themselves. I do not care to dwell on what I suspect the weevils left behind as proof of their occupancy.