The question for debate is therefore what consequence(s) if any would there be for Christianity if animals are indeed found to be self-aware and capable of ethical thinking. I have no objections if the debate also enters into the question of whether or not evidence already exists for this.
I would like to note that with better technology and continual investigation and learning the potential for such a discovery is always present. For example, many African Elephants are now tracked in the wild by GPS telemetry. This means that an accurate history of their movements is available to researchers. A recent report by the BBC news service recently covered an event where a matriarch Elephant died and "news" got round over a wide area such that many Elephants travelled a significant distance to visit the deceased. Both the communication and concern displayed adds to existing knowledge about the complex behaviour of Elephants. In an interview a researcher also mentioned that they were beginning to see Elephants removing the tusks of deceased relatives in a way that suggested they were trying to outwit poachers.
While looking for an online link to the story (which sadly I cannot seem to find) I found this video of Elephant paintings. This BBC webpage links to the video with the following image:
