I have never eaten my birds, yet, but was planning to. How different do the meats get depending on age of the bird? A local breeder seemed like she eats her layers after they have stopped producing, and I was wondering how tough the meat would be then? My mother-in-law is a farmer from the old country and she actually likes a chewier bird, compared to the fatty things I love from the plastic packages. Do they ever get to an age where the meat is not harvestable?