The frost covered grass does look cool. I like these 2 new shots.
Have you done anything to them in post, or are they straight out of the camera? It seems that they could both benefit from a levels adjustment (to make the blacks as dark as in your fist photo in this thread) and some overall sharpening.
And as additional refinements to that second new photo, what would help is to brighten and sharpen the eyes a bit. Also, not cutting off a part of the tail would help quite a lot with the comp.
You're improving.
Keep it up!