I have owned my new horse for 3 months and have recently decided to try join-up with him as he is quite nervous and I just want him to be happy. I do not have access to a round pen and so I have only been able to join-up with him in a 20m by 40m arena. I keep him on a yard on a very busy farm, and horses are turned out on two sides of the arena- the other two sides are flanked by a house and the farms main road. I have managed to have reasonably successful join-ups the first two times (only having trouble with drawing him into me, but he always comes eventually) but today when I tried to send him away, he only went in a half-hearted trot, and despite showing me all the signs when I invited him to come and join-up with me he continued to walk around the arena before becoming distracted and wandering off. I tried sending him away again. This time he did join-up with me, but half-way through follow up, he became distracted again and walked off to investigate a patch of grass. When I tried to lock eyes on eyes, he took flight but yet again when I had achieved follow-up he became distracted. I definitely did not look him in the eye during follow up but I expect it was my fault, but I'm not sure what I did. The yard was exceptionally busy today because there was a shoot happening later in the day- do you think this could have played a part in my horse's unwillingness to stick with me? Please help, I want the best for my horse.