Sounds like you were in the chest area somewhere since you had a pass through and didn't hear any bones when the arrow hit. You were at least 2 hours behind the deer which is good, poss. that it was a liver hit (dark blood) Lack of smell is a good sign and usually there is some form of stomach contents on a gut shot. Liver hits will take awhile for the animal to expire and they can cover a large area. Don't over look the possiblity that the animal circled and is in the opposite direction of what it ran off in. Wounded animals often circle back and hide especially if they don't know what hurt them.

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