Here you go. Just a couple of articles I found that talk about shelters importing foreign dogs. This has been going on for years in some parts of the country.
http://www.usatoday.com/news/nation/2007-10-21-dog-imports_N.htm
http://www.associatedcontent.com/article/2155971/do_no_kill_shelters_help_or_hurt_the.html
http://www.usatoday.com/news/nation/2007-10-21-dog-imports_N.htm
http://www.associatedcontent.com/article/2155971/do_no_kill_shelters_help_or_hurt_the.html