Thats why they can detect cancers and other diseases.. I actually dont like dogs very much, because their owners dont train them so they jump up and I have been knocked down.
But dogs are working animals and the reason that they were domesticated is that they have a purpose and it comes from their unusual abilities to sense things. Horses are the same way, and cats - only marginally domesticated - also have that ability. So thats why God gave us these three species to help us.
Months after a very bad bruise on my arm, s and with the scab having falling off, my cat sniffed it and made a face like he just smelled the most disgusting thing in the world.
It looked and smelled fine to me.
I wonder what was going on underneath the skin