Which characteristic was specifically favored in scent hounds for communicating their progress on a track?

Answer

A tendency to "bay" or bark while on a trail

For scent hounds, one favored trait was vocalization, specifically the tendency to 'bay' or bark while tracking to communicate the status of the scent trail back to the human hunter.

Which characteristic was specifically favored in scent hounds for communicating their progress on a track?

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