speckledhen, I wanted to suggest something. When going through chemo, I get peripheral neuropathy, which is damaged nerve endings. It's quite painful. One of the side effect medications caused very achy joints, and muscles. I bought ginger root, and grated it, and made ginger tea (not too strong) with a little honey, and drank a cup or two daily. It really did help a lot. More than I expected it too. It's got some good anti-inflammatory properties. Unknowingly, I bought an older piece of ginger, and it began sprouting. I threw it in a pot with potting soil. It grew like crazy. I transplanted it, and got a good bed of it growing. I wonder if your older chickens would benefit from it. Maybe make a tea, and pour some on their feed? I don't know if they would eat a little raw chopped ginger, but maybe. I've read that it can be dried, and sprinkled into their food, so if you have a food dehydrator, or maybe used the stove on low to dry it out, it would work for them. Anyway, it's a thought.