http://forum.bodybuilding.com/showthread.php?t=144085381&page=1
The guy had a right to grab the attacking dog off his dog.
http://www.forbesadvocate.com.au/news/local/news/general/horse-attacked-by-dogs/2523920.aspx
http://twambomakani.com/2012/04/17/dog-attack-victim-tells-his-story/
Should have shot the dog(s).