I usually ride my horse in a Clinton Anderson snaffle bit,but last Monday my trainer was using the bridle he usually uses so I had ride him in a curb bit. He did NOT like it. He wasn't responding to me very well,and he wouldn't do more than a trot,he usually can do at least one or two laps around the round pen. He did one canter stride for me. And he kept stopping randomly (partially because the round pen was near the field and the other horses were by the fence,but he's never done that before. I just bought him a saddle,bridle,and breastcollar online (I've only had him a week,but I've ridden him about 4 times),and he needs a bit. I can't afford a Clinton Anderson bit,it's like $65,and that's just too much. He uses either the smooth or square mouth,I can ask my trainer tomorrow. Anybody know where to buy a bit like it,but much cheaper,but still just affective?