My only general comment is to watch your cropping - don't know if you did this in camera or in post, for example, you have cropped off the bottom part of the deer's foot in #2. Also, it is not necessarily good composition to crop so closely. Often, wildlife (and tame life) is shown in the context of their environment - makes for a bit more interesting image. The first one is quite underexposed - it took a second or two to figure out what it was. Check out "rule of thirds for placement of objects in an image. My 0.02¢ FWIW.