Our mares love hedge apples.(Osage oranges).. They can be standing in brome grass and prefer to go find a nasty old thorny hedge tree and eat hedge apples..
I cut one open and tasted the center it was very bitter sweet. They also like the leaves and branches off the hedge tree too, thorns and all .. Hillbilly horses.
Sassyfras (my mare) also likes to drink from my canteen or water bottle, flavored water or gatorade makes her curl her lip.