Here in Vermont because of the same problem with finding a dead Deer that is in a swamp or thick stuff without a lot of blood, we can use a tracking dog that is trained to find them. These dogs must stay on the leash when tracking, not much can hide from a dogs nose. I think it was a wise thing for fish and game to allow this, less deer go unclaimed.
Leashed Tracking Dog to Recover Deer or Bear: A hunter who believes he or she has legally killed or wounded a deer or bear during hunting season may engage a person who has a “Leashed Tracking Dog Certificate” issued by the Vermont Fish & Wildlife Department to track and recover the animal during the season or within 24 hours after the season ends. Except as otherwise permitted in bear hunting, no person may use a dog to track dead or wounded deer or bear. A permitted bear houndsman may not pursue any bear for any hunter beyond a half-hour after sunset.
Applications for the “Leashed Tracking Dog Certificate” cost $25.00. First-time leashed tracking dog certificates, valid for five years, cost $100.00 for residents and $200.00 for nonresidents. Applicants must pass a test. Renewal certificates are $125.00 for residents and $225.00 for nonresidents.