Hi Eva & welcome to the Uni. It maybe that your horse has had some kind of unpleasant experience with a human & that is why he is acting this way. I have some suggestions. Firstly, review your Join up body language in a mirror in comparison to Monty in the Join up lessons - just to be sure that you are not sending your horse mixed messages. Secondly, next time you try to send him away have a light pole ( bamboo cane is good ) with a plastic bag attached - you can see Monty using this type of tool in the lessons. If he goes to turn his backend to you respond instantly by flapping the plastic vigorously so as to move him away from you. He will quickly get the message. Be careful not to be either too soft or too violent as you need him to be a bit shocked but not terrified. Too soft & not upping the pressure if he doesn't respond will effectively train acceptance of the plastic before it has had the desired effect. Obviously, once your horse is circling you keep the pole pointed down - just in case your horse decides to give misbehaving another chance. If he behaves for several sessions you can loose the pole but until he does then you have a means to painlessly instantly correct him. If he has had a bad experience in his past it's certain he will have had some harsh response which is why he feels the need to protect himself. He is not reacting to you but to the situation & he is expecting pain. The pole & plastic will keep him at a safe distance from you until he realises you mean him no hurt/harm. Stay safe, be careful to learn Equus thoroughly so your communications are clear, be consistent & fair with him & you will both end up having fun & building a wonderful relationship. Please let us know how things are going. Cheers, Jo.

Hi jo thank you so much for your advice I haven't been able to try it yet as I need to rent out my neighbours sand school ( we don't have a round pen). I'm sorry to nag but I have had my pair of horses for 2 years now and they are abosultly amazing but recently one of them has been really defensive of us and i'm not sure why. He used to belong to gypsy's and that is where he grew up also he is quite head shy of new people especially my riding instructor. I have been going up to them in the field to say hello ever since we got them but recently he has been really defensive when I go to stroke him and again turns away from me and puts his hind leg up as if readying to kick he has only been doing this the last few weeks but I don't know what's gotten into him. we have a track system so they live on bushes and hay basically and so they have hay nearly all day so sometimes he will be eating but he used to be absolutly fine with me coming up to him. I'm not sure what is going on. sorry for the long post 
Eva

Hi Eva. No apology needed, in fact you could have given more information but I will try & make some useful suggestions. I assume you are not in Britain but hopefully in your summertime now. It's unclear whether your 2 are alone together or in a livery situation where horses are intermixed & they & their people can change regularly. I don't think the cause of this change in behaviour is necessarily important: could be access to food, biting insects, new additions or recent losses from the herd causing bullying to sort out hierarchy, people interactions. Given the gypsy previous history & the inclination to be head shy it seems likely that your fella feels the need to separate himself from humans, despite having been more tolerant of you previously. Assuming that circumstances allow it ( able to interact with your horse without attracting other horses ) I suggest a rather non Monty approach. I have seen him use apples in a bowl to get a horse that was terrified of tractors to actually follow it round the roundpen after Monty had worked on the phobia. Your horse as never in his past had any human offer him a free treat - they always wanted something in response ( to catch him & work him, to separate him from his herd, to load him & move him to somewhere new, strange & unfamiliar ). So, give him free treats. Get a couple of big carrots, cut into reasonable sized chunks & take with you to visit him. Approach as you normally would, keeping your breathing slow & level. As soon as he starts to turn his rump towards you, stop, back away 3 steps & put a carrot chunk on the ground where he can see it ( 3 steps or so left or right of his tail ). Continue to walk a further 10 steps, stop & quietly observe, keeping your eyes directed at his knees so you can still see him but are not challenging him by eye to eye contact. If he ignores the first chunk for more than a minute ( use a watch as a minute is surprising long when you're waiting ) step slowly 4 paces towards his middle, place another chunk of carrot on the ground & retreat 8 paces. By now his curiosity will be getting really peaked - what is this human up to? Continue, making slow movements, leaving carrot chunks for him to enjoy & ask only that he tolerates your presence nearby. Do not try & touch him. Ideally, after a few sessions he will willingly approach you. This is when you must use huge self restraint. DO NOT REACH OUT AT HIM. Simply reinforce the previous situation by placing carrot chunks on the ground closer to you, remaining still & calm & allowing him to take them without any penalty ( not being required to allow human touch etc ). This will build a, for him, totally new relationship - a human who is good news. 

Now I'm making long posts! I hope this helps. There are 2 posts on the fore page about trust & my experiences with my guys. You might find them interesting. Bear in mind I was the first human to touch either Kirk or Moley & that was shortly after birth; in Moley's case she was still wet! Bella was a fabulous Mum allowing me such free early access. 

Let us know how you get on. Cheers, Jo.