1856 ‘Stonehenge’ ii. v. 131/2 Some [hounds] seem to hunt best in covert; some can pick out a cold ‘pad scent’.
2003 www.thetroutbum.com 7 Mar. (O.E.D. Archive) Bears can be hard to track by eye, but they are easy for a dog because the body and pad scent of the bear is overwhelmingly strong.