Help...We have a lovely 10.2 shetand X only problem is my 4 year old daughter is just learning to ride and whenever we ask him to go from trot to canter either on the long rein (with my running frantically behind trying to keep up!) or on the lunge (with me turning ever decreasing circles in the middle) but both when he is fully tacked and my daughter is mounted on him, he puts his head down and bucks. She has learnt how to stay on and I can bring him down almost straight away. I have lunged him with out a saddle and rider and he still does the same thing. He has no problems with his back hips or legs and the general thought is that he is being high spirited. She has just started pony club and has an easter fun ride coming up. Although it is just a walk for novices I have to be 100% sure that he will behave...can I fit side reins to prevent him putting his head down? If so do they clip to his bit and the girth or the saddle? Her legs are far too short to give a good kick...they lie on the saddlle flaps and anyway her inexperience prevents he from understanding all the instructions that I throw at her when he does this.