Whenever I ask for a canter he will give me one, maybe two strides then starts bucking in between strides. Very rarely I am able to get him into a nice relaxed canter it only holds for a little while because I am already worn out and can't keep my leg on him. I usually ride with a whip but he over-reacts if I have it when I ask for a canter, so I don't usually use it when I am asking for one.
If anyone has any suggestions they would be greatly appreciated.
Thanks in advance.