Today I bought a pork shoulder from Walmart, planning to grind it for a recipe. While slicing it open, I came across something really strange embedded deep inside the meat—a weird, grayish-green lump that looks almost like a paste or some kind of growth. What’s even stranger is that neither the meat nor the lump has any bad smell, but the appearance is definitely off and unsettling. Now I’m not sure what to do. Could this be some kind of abscess, tumor, or infection from the animal? Or maybe a defect that went unnoticed during processing?