I can't see any foggyness to these shots at all - however I suspect this might be an issue with viewing photos on an LCD screen. Most change the contrast considerably as the viewing angle changes; so unless you are looking at the screen dead straight the actual contrast will be modified - showing lighter if you're looking down at the screen and darker/more contrasty if you're looking up at the screen.
As I said I can't see any distinct foggy effect to these shots - if there was/is any then a contrast boost would solve the problem.
Overall I like them both, nice eye contact with the arctic fox, though I agree that the foreground grass is sadly ditracting - though when you're shooting animals in confined spaces you can oft shift a little for a slightly better angle if possible.
edit current, viewing on a very poor quality laptop screen so might well be seeing more contrast than some others