I remember reading about a Beijing resteraunt "Better than Deer" specializing in rat. They had their own farm where they raised grain-fed rats. I don't think that I would have a problem eating rat, but suspect that, like rabbit, it isn't something that I would particularly care for. Pigeon, on the other hand, I found delicious. (Albeit a bit scary -- I didn't realize that they shipped them with the heads still on.)