I should clarify, @LilyD ... I toss the feet, heads, intestines, lungs etc, but do keep Hearts and livers for my cats... I can’t be bothered to clean the gizzards. Everything else is stock material. Excess fat and skin sometimes goes into our chicken kale sausages as well. I’m jealous of your grinder now... what have you got? Our Lem grinder couldn’t handle necks and bones, and our ancient Toledo (has a three digit serial number) is currently being repaired. It’s older than most people here on the farm now.