Actually, we're thinking about breeding her. She was sold for next to nothing (to us!) at age 14 because she came up empty after two consecutive breedings and was unbroken. But she was not in good condition at that time - although she was well cared for she didn't get enough exercise. She is now in splendid condition and coming into season regularly (fortunately she doesn't get witchy when in season, just makes sheep's eyes at anything that looks like it MIGHT be a stallion . . . sigh).
She is about 20 (by her teeth - her papers are somewhere in the trainer's office files) and she's slowed down a step or two. The Red Cell really helps her energy level, she does a good deal of work - our trainer uses her for lessons when I'm not riding her, and of course during the fall and winter she hunts with me, during the spring and summer she's doing combined training, not to mention the occasional hunter show when I get nostalgic - so she's a busy little girl.
She's also getting the glucosamine/chondroitin for her occasional stiffness. The vet can't really pin down anything substantial, she's just a little gimpy on cold mornings until she gets warmed up (I am exactly the same way, so I know how she feels!)
Interesting... I thought she was youngish mare.
Red Cell is something to keep in mind with my old guy... right now weight and energy aren't a problem.
He's moving pretty sound so far this year, most days, he still floats when he plays in the pasture. He's on Isoxuprine in his feed for his Navicular, and he has pads on his feet. Other than that, he gets a supplement that is MSM/Gluc/Condroitin/Biotin all-in-one. I think three days this year I have Buted him because he seemed dumpy in a non-specific way I couldn't put my finger on. He hides pain really well.