The easy way to remember cherries, plums, etc., is "if it has pits, the horse can choke!" they are poisonous as well but even if they weren't, you still wouldn't want them to choke on a pit! Locoweed is a milkweed, all of which are poisonous! Any thing YOU wouldn't put in your mouth don't force into your horses! Except those apple treats! They smell good but taste BLAND!LOL