kevin1

All animals have a signature chemical scent, ours is a compound called L-Serine, it's what givesour species it's unique smell. Nearly all species react negatively to L-Serine, usually a fear response, nobody has discovered why this is. If you introduce any foreign smell into an environment and a deer winds it their instinctive reaction is alarm until they can assess the threat value. Threat value is based on instinct with most animals, but partly from experience. As noted above any animal that eats meat will also exude an odor unique to carnivores, I know guys who go vegan weeks before the season opener hoping to improve their odds.