My in laws had a 35 year old mare foal 2 years ago- no problems- she accidentally got bred. I have been breeding horses for years and in the past, I thought 22 was old, and have seen 22 year olds not "take". Personally - I have had no problems with older mares foaling-yet-Some vets will tell you its too old, unless the horse has had health issues or breeding issues. I want to bring a foal into this world because-simply- it's my horse-I love her... and I want a foal off of her-If i thought she wasnt capable of carrying-I wouldnt be considering it. She is in perfect health.Just like it's your dog....cat...etc. and you want babies off of them.It's not the same just buying a dog versus raising it yourself. I dont ride anymore-they are pets.I feed them brush em and look at them. I may climb up on Fury twice a year or so.Fury- the 22 year old has foaled twice- the last foal 2 years ago. the paint hasnt ever foaled. If i didnt think I could care for them- I certainly would not consider breeding either one, as I agree ther are a lot of unwanted horses out there. I want to breed them both at the same time- so the foals can bond, and be raised together. The horses I have found that need homes are starved looking and the owners want a premium price for them- . Not to mention half crazy with no coggins, shots, training, or manners. I have been through that with a PMU mare- she was CRAZY- you couldnt touch her, lead her or anything-she was huge, but skin and bones, - basically- I dont want to go out and buy horses, I want to raise them up, with proper nutrition, training, and good temperaments. If I had the room I would rescue some, but not for my personal use. It is hard to find a good horse with proper training.