I don’t see how this stands up to reason though. A deer without a functioning heart cannot push oxygen through to the brain, whereas a lung shot just reduces the amount of oxygen they can receive, and I can tell you as one who has twice had a lung spontaneously deflate that my oxygen levels, though unique, were still in the 98% range, and had everyone doubting a deflated lung as I could easily walk and talk, most can’t do either. So how would a deer with even just 30% do vs one getting nothing because the heart can’t work properly? I think your results were circumstantial.