My horse has never had leg splints either. I tried to put some on her and it was apparent that she didn't want them on her legs. Try getting some velcro ones (there just cloth with velcro and mine has zippers and velcro) and just put them on her legs just barely and lead her around with them and gradually tighten them up. Eventually put them on her back ones, too. I'd try putting them on her front ones first, because when she knows that there not gonna hurt her, she won't be as scared for you to put them on her back feet. Then make sure she'll be fine with them by leading her around. Before you know it you'll be riding and doing games. I know it seems like it takes alot of time but it shouldn't take but a few days if you work with her everyday. I hope this helps, because this is what i'm going to do with my horse.