My have lung attached - Lamb trachea sold in packs of 5, full of natural chondroitin and glucosamine to aid elderly dogs with joint issues or great chews for growing pups.
It can be fed raw and is classed as meat, or it can be dehydrated. If you haven’t a dehydrator place on parchment paper on a rack over night in your oven on the lowest setting with door slightly ajar and used as treats.
Typical analysis 100g
Water 64.1, Protein 20.1, Fat 14.1, Ash 1, Fibre 0.5