Layered Scents
It is almost impossible to understand the magnitude of a dog’s sense of smell, especially when compared to ours. For example, you and I smell chocolate cake, but a dog smells the parts of the cake: sugar, flour, eggs, butter, vanilla, salt, etc. Dogs have the ability to layer scent, which is why they can detect your footprints on the floor, even though many other people have walked over your tracks. A dog can smell fingerprints on a wall that are weeks old, which are undetectable to humans. A dog’s whole world is based in scent. Everything has a smell. When you come home from a long day out, odors from everywhere you went that day are picked up by your dog, upon arriving home.