Mr. Vacation has been having trouble around corners at a trot. He gets stiff and points his nose to the outside. When I started this spring I was unsure if he knew how to canter. I asked him on the trail and he did not pick up the canter (just a racing trot). Recently, he has started to canter around corners. The corners are nicer. Its a stride or two of canter and then back to trot. I am wondering if I should pull him down to a trot or let him canter corners. I don't want him to be punished for going into a canter, as I want him to know that cantering is okay (a thought that is not okay at the track). At the same time, our goal is a trot in the corner. He has a weak back end and part of me feels like if for the moment, cantering around corners is easier for him then we can do that. Will this cause problems down the line? He is going to be trail horse, and he is great on the trial. He is horrible in the ring and would not trot any part of the circle earlier this spring. I need him to be good in the ring because in all honesty, a prospective home is going to ride him in the arena once and a while. I don't need him to do olympic level dressage or even local level dressage. I just need him to go in a circle at the walk, trot and canter.