This is a mountain lion captured near where we live by a infrared game camera. They can be from 150-300 pounds. They hunt at night and usually eat their kill within a few days staying very close by to guard their kill.
Below are a few pictures of the fascinating and very deep track left by the deer being dragged. The deer was dragged down a hill, over rocks where I could see the scrape makes and down into a deep wash. Picture #6 shows the wash area where the deer was eat. There was some deer hair and this leg.
We are taking a nose work online class and it was fun thinking that perhaps the Border Collies were using some of their nose work skills. The last two pictures are of 2 deer legs a short distance from the wash that Myst found.