flyinlowe and ChasinTail--- gave incorrect info. Search under "Ellie Mae Tracking". I think that this is the link.
http://www.youtube.com/watch?v=wE23seKjnrg
It starts with Ellie sniffing the blood scent off the arrow. Then she is following a blood trail , which is impossible to see on the video. She is not tracking the deer's scent. That is not what you want! Only want the tracker to scent the blood. Otherwise could easily follow another deer off into who knows where.
I think that the folks up in NY are the John Jeanneney (Sp) family, who are known across the US as experts in both the breeding and the training of wire hair Dachshunds for blood trailing. I just bought a pup sired by a male from one of their litters. The dame was from long line of German Dachshunds bred for their ability to track. Named him "Boudin" ... a type Cajun sausage. He is about 10 weeks old now.