Shame about the horns, personaly I wouldn't have a horned goat, however friendly they are, they only have to lift their head or turn round quickly and there could be injury. In saying that, I suppose certain areas they may need a defence.
II'm also not sure about the wording 'will eat all your docks and thistles' (or something like that) people may think they will live on rubbish, they could have worded it better.