Have had a similar hit ! This deer sounds exactly the same. The " lung matter" is more likely fat permeated w/ blood. The deer i hit wheeled at the last split 2nd and the arrow wentbehind the shoulder but between it and the rib cage and the broken blade stopped the penetration when it lodged in the shoulder blade. Chances are that the combination of dry and fresh blood say that the deer is being bumped during trailing.Had to shoot mine a second time. Caught up to her on the blood trail when I circled around keepin wind in my favor and having a partner continue the trail. She didn't wanna leave the thick stuff , so after chasin her round the block 1 1/2 times we had apretty good guess as to where she was goin. That and a lot o LUCK!!!! I don't believe this hit sounds mortal, atleast not from hemorhaging. You may be surprised how a little blood goes a long way, like oil on the garage floor!! She's definitely running in circles ( backtraking). You may even catch her feeding in the same place if ya let her calm down a day or 2. Hope this helps!!!