I have been worrying about this same thing. We have an 8 year old maiden
mare that has taken us two years to get in foal. Recently I happened to
talk with the man who used to own her mother and he shared with me that
he had two foals out of her and she rejected both of them at birth. Of course
one of them is now the mare I own. After hearing this news I had become
concerned she may follow in her mothers footsteps, so I have also been trying
to "prepare" her for a foal. She has been doing the same thing as others have
mentioned when I try to feel/touch her udder. She lays her ears back and raises
her leg as in to say you are way over the line here. She isn't due for another 3
months, so I am continuing to work with her.
I hope my worries are unfounded!!
