how long does it take for a mare horse to foal a colt
How long does it take a mare to foal? 11 months on average, although some times, mainly with first time mares, it can be anywhere from 10 to 12 months.oal heat, or the first heat cycle after delivering a foal, usually starts at day 5-7 after delivery. It may begin later but most mares are in season by at least day 10. It la â¦ sts as long as any other heat...usually 5-6 days. After this first heat cycle most mares will cycle every 21-22 days.