Are you marking your blood trail? This helps see how the animal is moving. Wet your finger and wipe it on some of the dried blood - it may not be blood at all.

I'd be willing to bet that you have pushed the animal and it has button hooked on you a time or two, and that you have been close enough to spit on it. I wish I were close enough to help.

A second pair eyes is an invaluable asset when tracking. You need to track with both your eyes and ears and be patient. A lack of patience is responsible for losing a lot of animals, but is sounds like this isn't a problem for you.

This deer is in it's home territory and it is unlikely it will leave.

Bowhunter