honestly, If you cannot afford to get food for yourselves-cook those dead birds up-feed them back to the chickens-wait a few days and start butchering your chickens-if you can't afford to feed them they are useless to eat when starved and skinny. They will still "look" healthy for a while because thats what feathers do-fluff up. they will be very skinny underneath... With the temps getting colder they will not find food at all anymore and you will HAVE to feed them-Id butcher them -while they do have meat on their bones from free ranging-so you have a freezer full of meat and no chickens to feed through winter-