The cat is the best artistically, I think. The way it stands out clearly, and the background's kind of faded out is very good.
Personally I like the second picture best, though.
Number 4 is bit too inyourface kind of thing.
They all show joy and happiness
in the animals and they were very clear. My favorites are the first one and the one with the dog howling in the snow. I liked the first one because it has a bright background of the cars, trees, and grass. Also, the cat looked like a supermodel or something. It was so posed! I liked my other favorite because the dog was right in the center of the picture and in mid-bark. All the other ones just sort of complimented the good ones.

