That picture is just too cute! It reminds me of the time my husband was staining the deck a dark redwood color and my cat decided she just had to run across it when it was wet! We cleaned up her paws as well as we could and gave her milk and water to wash down whatever she had licked off. I hope you were using nontoxic paint, it may take a while to fade, it does add character though! I don't know why the animals always get into things that contrast their fur color the most!