I do some exercising riding on an 18y quarter horse mare. She's always had an extremely low headset which is supposed to engaged to hind end, but in her case it doesn't. She is really hard on her front legs as if she thinks her back legs are just for decoration or something. She's had mild laminitis and my mother does corective trimming on her. So to me it seems like she should be putting more weight on her back legs becouse of the pain in her front, but she doesn't. Her owner rides her some now and she's tender footed so she has front boots. I'm starting to think she might have arthritis, but she doesn't seem to be getting worse just always the same. I don't want to be riding her if she's in pain, but its hard to tell because she's such a sweet mare.