22 is imo a good age to quit breeding a horse who's of average vitality; the body has a harder time with carrying a foal, getting sufficient nutrition for it, etc. Would you please tell us how the foal might be a blessing? (You said that it could be. Perhaps you were only thinking of marketability, if registerable?)
Also to consider is whether the mare enjoys the hunter discipline--is her heart with yours here?-- & whether she has the talent for it to justify an abortion. Which role best suits her: hunter or mom?
Last edited by Northern; 07-03-2010 at 11:19 AM.