We call it "violated" chicken. Stick half a beer still in the can inside the chicken and stand it upright, cook for a few hours at ~250 and it'll fall right off the bone! These are just general guidelines, once you get used to cooking on a smoker you will get a better understanding of how long things take and what works, as well as what doesn't. Internal temp of chicken should be 165F or until the juices run clear.