Pinealectomy in chickens consistently produces scoliosis with lordosis, ertebral rotations, and rib humps, which hae anatomic characteristics similar to those of human idiopathic scoliosis.
This compression could be caused by a cervical rib, which is a congenital anomaly where an extra rib is located above the first rib; or by a Pancoast tumor, a type of lung cancer where tumor forms at the tip of the lung.
Their friends might " rib" them about it or bust their " chops" but don't " chuck" the idea all together because turning Groundhog Day into Whistlepig Day would leave some " pickled" pig.
It sits on top of the diaphragm, which is the main muscle that helps with breathing, behind the sternum - or breastbone, in front of the vertebral column, squished in-between two lungs, and is protected by the ribs.