Matching Heads: Hiss and Hers
A 2-headed snake has gone on display at a Zoo in southern Ukraine. No, they do not react as one... Zookeeper says the 2 heads react and eat separately. He does put a barrier between the heads so they don't try to chomp on each other during dinner.
The keep also says the 2 heads think separately. Dang, I'm losin' 2 to nothin' to a snake!