Have you tried
www.petharbor.com? It is a website of many shelters in different areas. If you put in your zip code and specific breeds it will pull up all the dogs that have been impound. Most have pictures. Unfortunately there are many horrible people that work for shelters that if they find a dog that they would like to keep for themselves or a family member they will never make it to the site. I continue to pray for Cookie's safe return.