if you walk on the ground you do leave a scent trail.
man hunters with blood hounds bank on this regularly.
as a bow hunter, i learned long ago the value of wearing quality knee high rubber boots ( contains human scent better) when going in & out to tree stands & not wearing the same around gas stations or anywhere else foreign, unnatural scents could be picked up.
as for horses, ive no experience there, but can see where it could probably help, unless of course you run up on a BF & the horse panics,bucks & runs for the hills....hi ho silver Away!!! leaving you as the Lone ranger w/ ol' BF