Breeding season is around the corner and I was just curious about something. I have heard two conflicting opinions about breeding mares to larger stallions. One opinion is that the foal can grow too large and cause complications. The other argument I heard was that the foal only grows as large as the mare can handle. I have personally seen a half saddlebred pony that was an accident. A saddlebred stallion bred the pony mare. No problems with delivery, however.