Casa Madelena posted this question in her blog, but I'm cross posting here because no one ever comments on the blogs.
She asks: "I am rescuing two horses to keep in my orchard in Spain. There are ten
olive trees, four walnut and several newly planted pear, plum, cherry and
peach. Can you advis if these are toxic to horses, I know wild cherry
and black walnut are but not cultivated crops?"