CR:
I think 3 and 4 had a lot of potential, in 3 you have got a really great moment with the bird creating a very interesting and prominent siluette, you have got the exposure and processing correct on this one, too bad the background is too cluttered, especially the pole just beind the bird is a bit disturbing. I really like the siluette of the bird and would have liked to se a less cluttered background that brought that out.
In 4 you have got some really cute kittens! How about a more close up shot.
In the spirit of focusing on the subjects, here is a link to an article from ron bigalows great site that I recommend, I read all of his articles, this one just happens to be about leaving out clutter:
The Art of Subtraction
I think your exposure is very good, just need to work on the composition a bit.
cheers