BAYOUBENGALS, The book mentioned is an excellent read for anyone interested in training a blood tracking dog. In fact there are several chapters in the book that would benifit many hunters in their tracking endevours.
As far as your J.R.T. goes lay a few small blood trails. Maybe 100 - 200ft at first just to see how interested the dog is in blood. Age them an hr or so. If it shows interest then you can make the trails longer. But if you do several blood trails at 100-200 ft and it does not show an interest then you would be better off finding another dog to train for blood tracking. A younger dog who has not learned to run hot game will be better and easier to train. Most dogs if they show interest can be made into blood trackers of fresh trails 4-6 hrs or less. But if you want a dog that will trail old cold lines then you will need to find one of the specialty breeds.
There are several good places to go for info on training a blood tracking dog.
www.unitedbloodtrackers.org National tracking organization
www.thetroutbum.com Forum just about blood tracking dogs
deer search out of N.Y N.Y. state based organization
If you have any question about training just send me a p.m. or an email