The farmer and the mule

Old man Jim has farmed all of his life, and for the past 8 years he has used his prize mule Dale to plow the fields. Ol Jim loves Dale more than anything on the farm. One morning Jim woke up, and went to get Dale out of the barn to plow one of the fields. As he was hooking up the plow he noticed Dale had went completely cross eyed. He stepped back in shock and said " O Lord! What am I gonna do? Dale is all I've got to pull a plow, and he ain't never gonna walk straight with these cross eyes." He ponders for a minute on what to do and then comes to the conclusion to call his long time friend Bill, who is a veterinarian. Bill comes down to the farm and says " Now Jimmy don't panic I know exactly what to do." Jim in disbelief says " Bill I just don't know I may have to put him down and count my loses." Bill said na let me show you what to do. Bill takes a garden hose about 6 ft. long, and shoves one end up the mules rear end and he says now Jim all you have to do is blow on this other end of the pipe and that mules eyes will go back to normal , watch this, Bill takes a breath and blows and bam the mules eyes are as straight as ever. Then Bill says now Jim you try this just in case it happens again so I don't have to come all the way out here, Jim says alright, but Bill swap the ends your mouth was on that one.