A fact from Tail chasing appeared on Wikipedia's Main Page in the Did you know column on 26 April 2018 (check views). The text of the entry was as follows:
Did you know... that tail chasing in dogs is a compulsion similar to those seen in humans suffering from OCD?
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This article is or was the subject of a Wiki Education Foundation-supported course assignment. Further details are available on the course page. Student editor(s): Sarahtorraville. Peer reviewers: Munstudent2018.