Re: Possibly breeding my horse?! Help please!
Er.. what height is she? She doesn't look that big from your photos. Putting her to a big stallion if she's not very big herself has two immediate problems I can think of... (a) if you are using natural covering, there is more risk of injury to her back and/or pelvis from a big heavy stallion, and (b) the risk of foal oversize is exponentially increased - this has the potential for her to have major problems carrying the foal, and foaling itsself - you could lose her, the foal, or both.
If she can be a bit feisty while she is in work... what is she like to handle when she is not in work? Is she ever aggressive? Some mares can be 100 times worse once there is a foal at foot, and you have to bear in mind her temperament when thinking about breeding too - the stallion is only half the genetics, you're not guaranteed a gentle, reliable weight carrier just because the stallion is quiet. You may end up with a hot-headed giant!
What age is she? If she is older and has never had a foal before, the risk of complications is much higher. Once she is pregnant she can still be ridden, but certainly not jumping in her later pregnancy at all!! Putting her in foal will prevent you from doing what you are doing with her justnow for example... so you need to think hard if you want to continue sharing her if this is what is to happen to her.
Also... why does she want to breed her in the first place? Not being cheeky, just a genuine question.