OK -- this is wacky but maybe the woman just can't be with horses. Here's my tale of a guy I met:
He always wanted to be around horses, ride, groom, pet, whatever... when he finally had an opportunity, the horses would freak out. Over the years, he has NEVER found a horse that he can approach. Dogs and cats love him to death. He is gentle and slow, unobtrusive but firm. Considerate of animal body language. He's been introduced to the calmest horses that never have issues, but when he shows up, the horse will run, kick, bite, weave... whatever. When he was a young man, he went to a psychic with him mom because his mom is into it. He's not, at all! But here's what the psychic said:
You like animals, don't you?
But you can't be around horses right?
That's because in a past life, you worked in a glue factory and the horses smell the death. You will never be able to work with or near a horse.
It's the wierdest thing, but I know this guy and what I've seen backs this tale up.