knabe
Well-known member
didn't know it occurs in dogs. it also occurs to a small extent in horses. a friend of mine used to have a peppy bred horse with an extra muscle over it's loin. haven't followed that too closely, but apparently it was common to select for it in horses for a while.
http://www.dailymail.co.uk/pages/live/articles/news/news.html?in_article_id=467985&in_page_id=1770
http://www.dailymail.co.uk/pages/live/articles/news/news.html?in_article_id=467985&in_page_id=1770