My chickens have on many occasions eaten all of my tomato plants with zero ill effects.I wonder if potatoes would do well in northeast Texas. I have enough ground to plant them even if just for fun. I wonder if the sheep would eat raw potatoes. Potato and tomato vines are members of the nightshade family and the leaves are poisonous so maybe not a good idea to let the sheep in to eat them. I have found that if you give them something that could be dangerous it will kill them, but if they steal it probably not. LOL However, I could just pull out the tomato and potato vines before turning in the sheep.