ironically tomatoes potatoes and peppers are all part of the deadly nightshade family, but yet buns can have a small amount of green pepper and tomato, i only ever give deseeded home grown tomatoes in the summer as a very small treat, as im intolorant to shop tomatoes yet perfectly fine with homegrown, if underipe they are quite acidic and shop bought one sare picked before they ready
cumcumber is lethal but i dont give it to them, nothing wrong with sticking to hearty veg and herbs
I feed cucumber and cherry or plum tomatoes occasionally....it's tomato leaves you need to watch out for. When was the book published?