Technical Issues Reason

1. wrong white balance, should be warmer. You see it nicely here:

2. this one is difficult. Maybe: lighten the blacks, darken the whites and add some contrast. I would also work the eye to get it more vivid and maybe to wipe out the slight impression of unsharpness. You have probably also a white balance problem with this one, as that is the major issue I saw on your pictures. There can't be much to get this one passed.

3. Besides the obvious IP troubles, your picture is unsharp, has washed out colours (too much noise reduction?) and you have sensor dust patches:

There is also a white balance issue.

4. has a noticeable focussing problem. You should forget about this one. As a side note, I would edit out the fodder bowls.

5. lighten the blacks/shadows, darken the whites. There may be a light focussing problem. In addition: you could apply a light warmer tone and some geometric correction.

6: White balance wrong. Maybe you should also add a bit of sharpness.