Quote: Heritage breeds are not like store chicken. We actually let out birds out of a small cage and even some of us let them walk around on green grass. Leg muscles and breast muscles are actually developed and have flavor and texture instead of mush. The older the bird the longer it should be *rested* after butchering. My older males I rest in ice salt water or applejuice for 4-5 days before cooking. My 10-12 week olds I rest and ice bath for 2 days. If i am doing cornish hens at 6 week or younger I rest for 12 hours. each age group has its own muscle development and needs to be butchered or soaked or rested it own special way.
6-8 weeks you can fry or bake on a lower temp and have tender juicy chicken
8-12 week you need to low temp bake with moisture and make special preperation to keep the breast meat from drying out before leg meat is done. You can cover the breast to help.
12-24 weeks you need to low slow roast with moisture for longer time. 160 degrees for a few hours ..I like to soak the chicken in milk over night before baking.
Some slow cookers low temps are too hot for older birds and can dry them out and can make them fiber string..ugh..make sure you use low temps for long times. Cooking in the oven at 280 degrees for 3 hours using two cups of applejuice and water for a 5 lb bird makes a tasty tender bird. The stock left in the pan will make the best soups you have ever made. My mouth is watering.
http://www.albc-usa.org/documents/cookingwheritagechicken.pdf