For those looking for ways to preserve food, one thing you may not have tried but likely have handy is eggs. I always save some eggs in the spring for use over the winter when the girls mostly or fully stop laying.
There are a number of ways to preserve eggs, but the three I think are best are freeze drying (very good but requires expensive equipment), freezing (works but uses valuable freezer space) or water-glassing (cheap, requires no power, but has ~10% failure rate). I've been doing water-glassing for a number of years now.
Here is the master thread on water-glassing:
https://www.backyardchickens.com/threads/water-glassing-egg-preservation-experiment.1428588/