Well, one big difference there is that domesiticated animals can't write or interpret laws, or write dictionaries. AI's can and do both. There is also an argument that intelligent animals can be "slaves" but we are getting into the realms of philosophy and current affairs then, and it isn't relevant to this discussion anyway. My point was a response to the question of "where would it get income", and that an AI can easily earn money. The question is whether or not it can keep it. If it is no more than an "engine", then it currently cannot.