Nah , they cant Read ! Seriously speaking having read most and talked over with many who have a good track record ........ Just get them out and enforce guidelines.
I have one good tracking dog (You could say self taught , although he was a serious wildfowling dog ) There is indeed little that is really hard compared to bird work as deer is the natural prey for dogs anyhow , not pheasant and they leave a whole load of stink behind compared to any bird !
Actually a cold trail of 48 hours say is especially tough but look at the success rates on those , if the deer hasn't bled much . Of course they could me miles away
I think i have read them all and feel although worth reading and even more attending training days ....... take the dog out on them for real , allow them to eat off a kill and mess with heads , skins etc .
One of the best i have worked with is a mates lab , he says he didnt know what to do to train a " night culling dog" so he just got her to sit and look towards him . Put a few down in an area, let the dog out and it sits and faces you , walk up to her and say " next " it finds the next nearest etc etc .
almost everything your asking of a deer dog is 100% natural to a dog , let them at it with a few rules IMO