High school guidance counselors were trading emails and posting comments on listservs Wednesday about unexpected packages from the College Board containing stickers showing a cow. Many wondered why they were receiving the packages -- some were annoyed at the cost and apparent effort to promote College Board services. Others thought the College Board was showing a sense of humor. The source of the stickers? On the last PSAT, there was a question involving a cow that led to much social media discussion after the test.