Likewise, our pups can spot all the security features in our money. The U.S. Government has gone to great lengths to mark our paper currency to ensure it cannot be easily duplicated by counterfeiters.
First: some facts about our money. U.S. greenbacks are comprised of 75% cotton and 25% linen, making it extremely more durable than regular paper, and the same company has been providing that paper since 1879. Cool, right? Now, all $5.00, $10.00, $20.00 and $50.00, etc. have security threads and watermarks that need to be held up to ultraviolet light. The $100.00 bills actually have a 3d holographic security ribbon woven to the right of Benjamin Franklin's portrait.
Hold up a bill and move it back and forth and the bells actually change to 100s and move. Take that, counterfeiters - and dogs can spot these security features and watermarks easily and without an ultraviolet light - here is how.
Signs Your Dog Can See Ultraviolet Light
It helps animals see urine trails, which can help a predator find a juicy, meaty snack out in the wild - oh, cruel nature. Back to our household pups, who, thankfully aren't our predators. We, mere humans, have to use a separate UV light to see the security threads and watermarks on U.S. currency- dogs, do not.
Have you ever noticed your doggo acting strangely or chasing something you just can't see? Stalking, barking, pouncing, and tail wagging at nothing are signs your pup is seeing something and wants to play, capture it or warn you about it, or to clean it better if it is a pee-pee faux paw in the rug. Anyone who has loved a dog and truly understands the depth of our love for them will gladly take on a little (or a whole lot) of extra housekeeping for the ruff of their lives.
- Wag tail
- Pupils dilated
- Play bowing
- Nose to the ground
- Pawing at the ground
History of Dogs Seeing Ultraviolet
Insects like bees and other crawly, little critters, by using their UV vision, can see patterns on the plant-life they are scooting around on that will lead them to sweet nectar to eat. Rats follow urine trails to fine food or other garbage to eat, and as studies show, kitties and dogs can also see UV vision, which, for dogs, includes seeing those invisible to the human eye security threads and watermarks on U.S. currency.
Science Behind Dogs' UV Vision
Humans can't see UV light because the lens of our eyes is designed to absorb this type of light so it cannot reach our retina and damage our eyes. Dogs can see UV light because their eyes are designed differently, with different light filters, or cones, than humans. UV light often affects a dog's eyes later in life in the form of cataracts.
Using UV Light to Train Dogs
Are you looking to be sure all surfaces are free from urine or bacteria? We, mere humans, need to look at the surfaces under a black light but your furry friend can see it freely. If your dog is sniffing along the ground over and over, this may be an area you would want to clean more thoroughly.
How to React to Your Dog Seeing Something You Can't:
If your dog is seeing a UV lit urine trail, clean, clean, clean and disinfect that area.
Look through an actual UV light; do you see what they see?
Play along - let them know you understand.