I like where this is going as well .This entry and 8 are taking the lead. I would drop the caption line. The colours need to be changed on the first dog more true colour to the animal. Possibly play with the colour scheme, If you have any further ideas on how to spruce this up bit. i am interested. I like the idea of the dogs running.
Starting back on your first submission #5. Keep the text as is. Change the swoosh to the gold colour of the text in #8. Look for a different yellow for the dog. i know this part is harded. The colour yellow on the other submisions just isn't working.
second idea: Change the swoosh to a blue and do the other items listed above. See the blue in #8.