Welcome to the world of minis; I warn you, they are very addictive! I've been showing them since 2005 and the only reason I have only one is because im a student with no space for more!
The AMHA rule book says to show they square (like a quarter horse) but right now the trend is to have the back legs a little stretched. With my guy, having his back legs a little stretched rather than perfectly square makes him look better for conformation classes, so try different "poses" with your guy and see what makes him look best.
In the show ring today, cable halters with a wide nose-band are the only thing you see in halter classes, and than normal halters for other events. However, if you show your guy as a yearling, he would most likely out grow the halter you get for him. I see you are from oregon, the North West Miniature horse Club (NWMHC) is a thriving and large club in your area; I was done from canada to compete at a show hosted by them in eugene and I can say they are all really nice people. Not only are they a great source of info, but you may be able to do what I did and borrow small halters from others until your boy is full grow; it also gives you a chance to find what looks good on him before you spend $100+ on one.
There are not different breeds, but certain lineages have different "styles" some bloodlines look very stocky, some very refined, etc. This creates the appearances of many different types of minis (ie, I have a mini Thoroughbred in my yard!).
No question is stupid!! Please feel free to ask more, Im always willing to help out! I asked my fair share when I was starting out, guess I better give back :p
Whats your little guys name? Can we see a picture?
Last edited by fanch; 10-14-2012 at 04:24 PM.