We had our almost 4 year old hens butchered last week. Kept them in a brine of salt water, then vacuum sealed and froze. I kept one out to cook for Sunday dinner. Well, after 10 hours in the crock pot the meat finally starting coming off the bone. Luckily I had leftovers from the night before as I didn't feel like making pot pie at 8 o'clock at night. It was a learning experience as now I know how to do the next 8 hens.