I am not a vet but I do know that horses are used to produce foal until late in life, 11 considered and adult but not senior, before breeding you mare please consult with you veterinarian before breeding and read the following link on why I want to breed my mare. http://www.insecthobbyist.com/articles/HorseHobbyist/HorseBreeding.html

I would first ask myself...WHY DO YOU WANT TO? Does this mare have some major outstanding quality to bring to the world of the purebred T. Walking horse...or Gaited horses in general? Do you show her? Does she have a lot of titles and ribbons that will make selling her offspring a SURE THING? Have you checked up on the full cost of both the breeding fee and the cost of raising the baby to a point of sell? Have you researched WHAT STALLION would add the very best qualities to this baby to be? Qualities your mare has lacking or less of to really try and create an IMPROVEMENT in the colt or filly? Are you prepared to deal with personality changes your mare may undergo in becoming a mother. Do you have the experience or access to help if she turns out not to be interested in her baby...it happens sometimes. Are you aware of the things that CAN GO WRONG during the birth, such as a torn uterus or other internal organ that can (generally does unless you are very lucky) lead to a dead mare and an orphaned or dead baby? Most of the time, everything comes out just fine...but anyone who just wants a second or baby horse because it would be "cool" to have the experience...needs to stop and think about these things. Eleven is not too old, especially for an EXPERIENCED mare in excellent health and condition....not overbred..but I would still think long and hard as to WHY before going forward with the idea on a first time breeding, or any breeding of any animal.

I'd say no. Many horses continue to have foals into their late teens. If she is still physically fit then I don't see why not. I remember a horse having a foal at 24!

Of Course not! We breed Standardbreds and we usualy breed them whenb they finish racing. (age 14)

Provided the mare is in good health and condition and you have a purpose for the foal - there would be no reason as to why she could not be bred from.

Has she ever been bred before? She's isn't too old but it's more difficult on older mares to conceive and foal. Why do you want to breed her? Would you be willing to go through the expense and slight medical risk for this? If you are just looking fro a way to have another horse, it's better and cheaper to buy just the horse you are looking for.