My horse, Roxy, is very good at her job. She can carry a 12 yr old around a 18in course at a local schooling show, or she can take me around a 3ft course at the rated shows. She rarely comes up lame, only when she gets kicked usually. But lately, she has a cracking in her left hip. When I ride her she pulls down on me when I ask her to use her hind end. She doesn't come up lame, she just has this cracking when she works. She doesn't seem sore on it, she just doesn't want to put pressure on it when she jumps the bigger things. Any information would help, I hear there is a hip flexion test and I was wondering if anyone knew anything about it.