Black walnuts have thick green hulls with juicy pulp underneath them. Under that is the walnut in shell. Often, in the pulp, there are little worms. They're totally harmless to the nut and I have been throwing them away with the hulls, but today we let some of the chickens have them. They went nuts! So... is there any reason to not hull the nuts in the pen and leave the wormy hulls for them to pick through? How about leaving a pile of them to attract more of these worms for them to eat? Edit: I live on a property with a LOT of black walnut trees. I've been collecting buckets and buckets and buckets full of the things. There's definitely a lot of potential for food here, both for the chickens and myself. Also, if anybody knows any other ways to utilize the nuts (shells for bedding or grit maybe?) that would be good. Always looking to save a dollar!