Hey, I have a 17 year old quater horse mare. She's a pretty big horse and im a pretty big guy. I ride her alot, we barrel race and rope. We also do some trail riding on the side. Lately I have been noticing her joints popping when she walks and trots. Her neck pops when she bends it as well. What should I do for this?? I don't have a very big budget. Thanks!