I lost a deer last year, swear I had a double lung. Tracked till 2 am lookin for it, rain started in about 2 hrs after I shot. Hear a guy about 400 yrds away found it (was informed of it this year, after tellin the story). Guy couldnt believe I shot the deer so far from where he lived and it made it that far, he figured neighbor shot it. Hear lots of storys like this and some quite amazing ones of deer traveling wounded very far. Sorry to hear it, grid search with some marking tape, bring someones lab out with ya. Good luck..