I have a 3 1/2 year old gelding that when riding and taking him out and trying to get him to cross a little creek (appx.2 ft. wide)he will not cross it. He will just dance around and fight it.He goes into a panic sweat and everything. It is like he is scared to death of creeks or something. Any suggestions on how to break him of this and being able to get him to cross wet and dry creeks? Thanks!