What is up with my horses?

he is just pissy. not letting you take him out or brush him he is manipulating you and others with his bad behaviour, when you set a task with him you must complete it. horses learn what they are taught and if you back down from a challenge he has learned his attitude will win. start working him daily by patiently brushing or handwalking get this guy used to people and dont back down on this. just gentle and firm and he will again adjust, also the guy needs a bud. I have a gelding who used to pull similar things was actaully dropped off at a slaughter house because he was "dangerous". he was a lonely guy who learned to intimidate, hopefully you will find a suitable companion horse or mule for him. my guy just needed a very mean arab mare;) good luck oh and if my guy gets the grouchies with me he doesnt get grain that day just hay