Big horse, small indoor what to do ?
So I am riding a really really nice horse who is about 18 hh. He's really fantastic and I really like riding him, but now that its getting colder, we're going to be in the indoor a lot more. My barn's indoor is really really tiny, and usually it is fine, but with a horse as big as this guy, it's a little too small for cantering, especially because he has a HUGE stride, even for his size. I rode him in the indoor yesterday, and I really couldn't canter him. I'm pretty good at collecting a horse and getting them to rock back and bring their inside leg up under them, even on finicky horses. This guy likes a very soft hand, but is really good with seat. He doesn't like to be forced into a frame, he likes to just loosen up and go hunter-ey. While that is a nice ride in a large arena or a field, it's not a possible or productive way to go in our indoor. When I tried to canter him in the indoor for the first time, he just ran and then broke into a fast strung out trot. I am not an extremely timid rider, but I don't know him very well and other people have told me things about him being finicky. I spent pretty much my entire ride doing sitting trot, but I would like to be able to canter him this winter, so how can I go about getting him in a better way as far as cantering is concerned? My trainer is not around this week, but I will ask her advive when she gets back.