Re: Whole chicken for more than 1 meal?
I use a "normal" size chicken. 1st meal is roast chicken or I cut it up and bake the pieces. I offer 2 side dishes or more with each meal. Each person gets 1 piece of meat (1 leg, 1 thigh, or 1/2 a breast) and a serving of each side. They do not get 2nds on anything till after they everything on their plate.
If it is a roasted chicken I wait till after dinner. I pick all the meat off the bones. I cook the bones overnight for a nice broth. The leftover meat is sometimes used for a different meal than the soup.
If I chop up the chicken to bake it, then rib bones and extras are started to cook while I'm baking the other dish. (I just throw it into a big pot of water, bring to a boil, then simmer. Before I make the soup, I strain out the bones. Then add onion, celery, carrot, and potato (or noodles/rice/whatever I got).