RE: Need advice lost deer.
I tracked 2 last year the sound about the same. Both deer were shot low though the front leg at the meaty part. Both blood trails we had great blood for about 100 to 150 yards then tapered off. Both bucks showed back up on film a couple days later. I would do a grid search where you left off and see if he is dead and if you can't find him after that I think he still might be alive.