If the numbers are correct, the high iso and the very small aperture may have contributed much toward the softness of this one, which was mentioned by both you and one commenter. Light coming through a tiny aperture becomes diffused as the aperture begins working somewhat like a pinhole lens as it becomes smaller and smaller. It's just physics. The best sharpness is between f5.6 and f11 for most lenses.
I also see the disruption of the diagonal shadow across the subject. With sleeping animals though, you can't just rearrange things without losing the subject.
You have a very good looking friend here, and I can see in your portfolio that he means a lot to you. |