I think a lot of People would be surprised at what their dogs are capable of, if they just stayed out of the way... "Ole Dan is gettin' out a lil far, hate him to bump a deer."
Most folks won't give dogs time to sort out a track either, if it's not hot enough to bolt with, let's move on...
That gets dogs in the rut of not even considering those colder tracks...
x2
If the dog handler is always in a hurry and doesn't hunt with the curs then the curs will learn to leave colder tracks alone because the handler will not wait on the dogs and the dogs know this so they will be more focused on keeping up with the 4 wheeler than running a colder track.