These guys are 4/5mo old and some may be a bit older by the time we get to processing them all. The ones we have done so far are tough. I've put them in salted water for 24hrs but that hasn't tenderized them much. Do they need to stay in longer? I've slow cooked them in a crock pot and I've seared the breast meat med. rare. I still find the breast meat either too dry(slow cooked) or tough(cooked med. rare)though overall I do like the flavor of them. Recommendations? Thanks!!