We used a crock pot on some year old P RIR roosters dressed out about 6-7 lbs. We felt they were pretty much perfectly cooked, considering their age. I tried baking, grilling, etc. Wasn't a fan.
4-5 hours in a large crock pot on high, water to cover.
Broth, 3 Tablespoons chicken broth- 1 T beef broth, a few T of red wine, garden chopped garlic/ onions/ celery/ carrots/ potatoes, added in early. Spinach/ greens, mushrooms/ squash/ 1 T barley added last half hour. I don't usually add additional salt, but if you prefer a bit more salty, try Liquid Aminos soy sauce alternative to salt. It's brown and can darken broth nicely, with good body (not thin/runny), and also imparts a very pleasant subtle flavor- not a soy sauce flavor.
That sounds good! We will have to tweak with it because DH has ESRD and cannot have salt or potatoes or most greens (anything high in phosphate).