Costco's rotisserie chickens are delicious. My favourite method to eat roasted chicken is to pick at it, and I usually go for the oyster first.
The chicken's oyster is placed behind the backbone. There are two right where the chicken's bottom half starts, just past the thighs, in a shallow bowl-shaped bone
These morsels are delicious for many reasons. If you roast breast-side up, they don't get exposed to direct heat since they're on the bottom. No of the approach, they cook gently.
If you buy a bird and butcher it, it's simple to mangle or leave the oysters on the back.
If you roast a chicken or buy a rotisserie chicken, turn it over and remove the organs before anybody else can. Even in the vehicle! Then pick at it like I do; that's how you eat a chicken.