One of the most common questions we get asked at K9 University is whether or not our dogs can smell through aluminum foil. The answer is yes, they definitely can!
Dogs have an incredible sense of smell that is up to 10,000 times more sensitive than ours. They can smell things that we would never even think to try and detect. This means that they are able to pick up on very faint scents, even if those scents are trapped inside something like aluminum foil.
So, if you're trying to hide something from your dog by wrapping it in foil, think again! They'll be able to sniff it out in no time.