Lamar advertising is allow you to upload an image of your put to be shown on one of their billboards this month for free.
"Simply complete a submission by uploading information about your pet and an image, choose from one of our design templates, select a billboard location, time and date, and get ready to see your pet featured on one of our billboards in your community.
We are accepting submissions now through May 31st."Link to the Free Offer
Also take a look at other Freebies going on Right Now