Some companions are expert trackers, able to use their scent ability to follow any trail.
Tracker Skills: Trackers treat Survival as a class skill.
Expert Tracker (Ex)
A tracker gains a competence bonus on Survival checks to track via scent equal to half its total Hit Dice. At 6th level, it can move at its normal speed while using Survival to follow tracks without taking the normal –5 penalty. It takes only a –10 penalty (instead of the normal –20 penalty) when moving at up to twice its normal speed while tracking.
This replaces share spells and devotion.
Pathfinder Roleplaying Game Ultimate Wilderness © 2017, Paizo Inc.; Authors: Alexander Augunas, John Bennett, Robert Brookes, John Compton, Dan Dillon, Steven T. Helt, Thurston Hillman, Eric Hindley, Mikko Kallio, Jason Keeley, Isabelle Lee, Jason Nelson, Stephen Radney-MacFarland, Alex Riggs, David N. Ross, David Schwartz, Mark Seifter, Jeffery Swank, and Linda Zayas-Palmer.