Yep, got a Belgian mare that is a little over 17 hands and she had been bred to a barely 14 hand QH. Now the baby is a yearling and standing at 15 hands. Sometimes you will get a structural crop-out even from same-size matings. At an Appy show farm my Dad used to work at, there was an appy mare and stud that both stood a little over 14 hands. They were bred several times and each of those times, the foals matured to a little over 14 hands. They were bred again and the resulting foal was a mutant. He matured to a little over 16 hands LOL. So breeding is always a complete toss up as for what you will get.
I bred my very dainty 14hh Arab mare to a 17hh beast of a Hanoverian and she not only hid her pregnancy (she kept coming into heat and everyone thought she was sterile) but gave birth all by herself with no complications.
Ironically though, the foal only hit 14.3hh which is the size of my purebred Arabian half sister of her and sired by a roughly 15hh Arab stud.
If you're worried about the size issue during covering - do AI.
I know of a breeder who breeds Welsh A's and C's to a 17hh Dutch Warmblood stallion for sport pony foals. When I asked her about the size issue she told me what the other posters have said... when I asked about "how" it gets done so the mare isn't injured, she told me "AI - it's the safest way to go."
My mare had a foal this year. She is 14.2-3 welsh/appy and the stud is a 17.2 and still growing clyde, and no probs, considering they 'pasture bred' and he had big, erm... boy parts. Sonya ripped during foaling, but that was because the guy delivering wasn't pulling with the contractions. My filly had a little trouble the first few times she nursed because she was so tall, but other than she is fine. She is now 5 months and about 12.2 or so.
I think the height difference between your mare and the stud you are looking at is not that big considering some heigt diffences. Posted via Mobile Device
I'll never forget when my friends 17.3hh clydieXWB broke into the welsh paddock...11 months later the cutest little filly was born from a 12.3 hh mare, no tearing or anything, the foal grew to 15.3hh hilarious to watch this massive foal running around with the mare, it had to have supplemental feeding though because it grew so quick and the mare didn't produce enough milk.
My mare Freyja (15.2 hh Shire/Paint cross) was bred, back to back, to a 18.2 hh Shire stallion (before I got her), carried and delivered both foals with no problems. The babies both were quite large as newborns, but Freyja had no delivery issues at all.
My friend had a 16.3hh OTTB mare she bred (live cover) to a 14hh Arab stud. The colt is 5 years old now and 17.3hh!
I was always told that usually the height comes from the mother, but I doubt that's always the case.
I have always been told that as a general rule you should stay with in 2 hh. I was also told that the bigger the stallion the more chance there will be of his penis bruising the mares cervix and then she may not take. I have seen it where a stud bred a pony mare (by accident) and eveything was fine.