The images of the pup are really lovely. The use of this is a good design. I would like to see a bit larger image of the one running toward us. Try overlapping some of the image so they may not look quite so dropped in.
I really do like the cat images. Since I like scrapbooking, this collage reminds me of that in a way. Again, maybe some overlapping might work here.
What do you like about them both and what gives you pause?