Red Fox Puzzle in Slick Mud

 

There are a lot of puncture marks here, some of which don't belong with this particular pair of feet.  Can you find the toes that go with the nails?  Can you find the heel pads?  Notice how far ahead of the toe the nails hit the mud.

 

This is the complete photo

I call these a front and rear because the upper track is much larger than the lower.  If you look very carefully you will find another track on the left, showing two clear nails, and one clear toe.