prey update is still dev only and not finished! it's pretty guaranteed to be buggy etc. at this point.
for tips: check your feeding settings, under the clearing button/freshkill pile. You can change who gets fed first (may want to feed less nutrition first) and ration prey (generally a good idea cause it saves prey and they won't starve when rationing)
you can also manually feed cats, which if they're starving can bring them back to the point where they can hunt and help the clan. Good luck!