I'm sure you will but please post the resulting condition of the hens that are old. My flock is not old enough to have "old hens" but I do hope they get there some day. Posting good info such as that will help me and others to plan on what to expect form our flocks fed with FF from day one. The 20+ cockerels (not the CX type) that we did process were very healthy, the meat was nice and firm, not mushy, they were allowed the run of our backyard, not a large area but they get exercise. I have added the local meat chicks (bought from the feed store) to our broody hens when they don't have a fair hatching, they too are allowed to range the backyard, none have had leg problems nor any other problems and they are not full of fat when processed around 10 weeks. I do not know exactly what breed these meat chicks are but they do resemble the CX chickens. I'm guessing they have been raised here in the tropics and have adjusted to the climate from whatever stock they were to begin with.I have a few that have a tendency to put on weight now they are old, so I am constantly adjusting what I feed to force them to walk more and forage more...just trying to make them stay healthy for as long as possible, but I've still got a couple on the roster for a fall culling due to old age and body changes. I think they are at the end of their good laying life and it's all trouble and old age symptoms from here on out. It should be interesting to see the condition of their organs when I process as they are very old, heavy breed birds.