Remember those vicious things from the past couple summers? A lot of chickens and other poultry were lost to those horrid things. As were even livestock.
http://www.aces.uiuc.edu/news/stories/news4053.html
It doesn't really mention the often suggested vanilla extract, but I have heard a lot of people did have good success with it.
http://www.aces.uiuc.edu/news/stories/news4053.html
It doesn't really mention the often suggested vanilla extract, but I have heard a lot of people did have good success with it.