I grew up with chickens and processed and ate a whole lot before I found this forum. It was on this forum that I first learned that some people scoop out the lungs and kidneys. It never even occurred to me to want to remove them - why waste food? In my family we ate everything that was edible on all of our food animals, including the brains and all of the organs minus the gall bladder and chicken intestines (mammal intestines make great sausages when stuffed with meat and spices!). When I make soup, I put everything in it - heart, liver, spleen, gizzard, testicles (if male), lungs and kidneys that remain on the carcass, neck, feet, and head, along with the skeletal meat. Best chicken soup!