sorry what i mean is when you jump at home how long before you jump do you school for ?
remember at the end of the day you know your pony.
i only warn jack up for 10 mins max and only go over 2 jumps (one x pole one upright) and he goes great like that but when my instructor is with me she makes me warm up for 20 mins and go over loads of jumps and we never do well like that ( she never comes with us anymore..)
dont do too much canter work... if its his first time show jumping put a red ribbon in his tail (it means he kicks) even if he doesn't kick it will keep people from getting too close to you and upsetting him..