So a couple of things to think about.Since the change in Steeple chasers last year, you are less likely to get brilliant broodmares, but that doesn't mean they wont throw a champion foal. Breeding steeple chasers is a hell of a lot harder then other thoroughbreds. It is near impossible for a steeplechase mare these days to throw more then one top quality horse, you only have to look at your mares dam to see that. But thats just from my experience.
How much do you like racing her, and how desperate are you for a foal? She will be 7 next year and if you retire at the end of the year you can still get 5 or 6 foals out of her.
Personally I would keep racing, and that is coming from someone who doesn't like racing steeple chase mares after they turn 6, even if they are superstars.
