pissing all around the spot is the cheapest way to go. anything is going to have to be reapplied after every rain to be effective. urine is how animals communicate anyhow and they can def differentiate human urine from all others. certain pest like skunks and raccoons eat and are attracted to soap they will also dig up a patch just to be cunts. hair (if its your own) can be dna tested (local LEO won't but DEA will) and its only effective for as long as the shampoo contained in it is there, so again after the first rain its useless. so buy some predator piss or use your own. storing it and letting it ferment makes it more pungent and longer lasting