Cain and Abel the Anglo Nubians eat all our potato peelings, skins and anything else veg wise. And they are still here. I think its the potato tops that are poisonous to any animal, that is, when you grow potatoes, the green stem and leaves above the soil, so don't ever feed those, and I think its right they should not even be on the compost heap they are so bad. Bit strange when you consider we eat the potato under the stalk and thats fine!! Only other no no for animals is the big green cabbage tops off rhubarb, thats poisonous.