My roosters a barred rock (Cornelius) and a younger Rhode Island red (Hae Hae) have always gotten along. then yesterday Cornelius went onto the neighbors side of the fence into another pasture. Cornelius can't figure out how to get back onto our side of the fence. Meanwhile Hae Hae decided to start fighting Cornelius through the fence. Both chickens are very bloody. I've tried getting Cornelius back onto our side of the fence with no luck. Once I get him back on our side then I can figure out how to treat him.