For sensitive, intelligent companionship, it is difficult to do better than our four-legged family members. Our three cats are quite tolerant of my pipes. They study the smoke as it rises, and don't evade me when I'm lit up. The question of animal intelligence strikes me as a settled matter. If you have to ask, you aren't astute enough to answer the question. I get far more communicative signals from dogs and cats in less time than I get from most people in weeks, most of it highly coherent and factually right on the mark. Also, you know right away how they are feeling about you at the moment; the fact that they themselves know continuously puts them ahead of most humans. The evolution of intellect is incremental and humans are not leading the game in all respects ... folks.