My sympathies xkatex
. I think we all wish that when our friends do finally leave us, it will be a peaceful event, and that we get to spend as much time as possible while together before that time comes. Sadly, like your girl, cruelly, that time can be cut short. I lost a mare very close to my heart 2 years ago now. She was the same age as yours when she left me (and my folks), and we'd grown up together as well. I only wish we'd had more time together. Unfortunately these things, horrible things do happen. It does sound as if something went wrong during the birth, something we all dread. While it might be of interest if there was the option to determine her cause of death, the fact is that things can go wrong from conception to birth with any living organism. There's an amount of risk with every case. I am very sorry for your loss, and hope that the foal continues to do well. I can't imagine the somewhat odd series of emotions you and your family must be enduring during this time. It sounds a bitterly sweet sad time.