Originally Posted by bermuda
I've had dogs that seem to make decisions, or at least they try to exercise their will until I make enough demands. So I say dogs can reason, though they're not always reasonable.
This from Wikipedia. Only an excerpt but again there is nothing definitive since they can't speak.
While humans have had differing views of animal emotion, the scientific examination of animal emotion has led to little information beyond a recognition that animals have the capacity for pain and fear, and such responses as are needed for survival