Include the town, the region and the breed of your lost dog.
Please post images that are about 2mb in size.
Try to think what someone may type in on Google search if they found your dog and use the same wording in your post.
Share your post of your lost dog on all the social networks you can, facebook, twitter, google+ etc. Use the url in the address bar, or click the share buttons.
This will help your lost dog to show up quickly in Google Search results.
If you boost your post with any amount, all the funds will go to promoting your lost dogs advert in the area that you specify. We use Google and Facebook for targeted adverts. It can make a huge difference.