Is it a registered horse show (Like AQHA, APHA, TWH)? Because if it isn't I think you can leave it long. If it is an AQHA show, then I think you have to pull and band it, but I'm not sure. Thats problably not very informative, but I hope it gave you at least a little help.I’m showing in a show in March where I will be doing western pleasure this show is kinda big it’s all breed and it costs 100$ just to do one class and I’ve never shown pleasure at a show like this and I was wondering do I have to cut my horses Mane or can I leave it long?