I have a gelding and I am having some problems with his canter. He mainly disunities and as soon as you get of his back he looses his back legs. He is a very nice boy and he is only 8 years old. Oh yeah I am a show jumper, if that helps with anything. He normally disunites in corners and especially when I am riding him at faster speeds. If anyone has anymore questions please ask, because I have been riding him for more than 2 years and I would really like to find out how to get rid of his disuniting. Thank you.