Oh dear, Younglin, you'd be rather surprised how great intellectuals like Einstein and Newton didn't happen to think about the same aspects of physics.
I have nothing against Younglin. He seems like a decent individual who does the necessary preparation and precautions. However, too many mistakes have been made by beginners who tend to describe their pets as liking each other, which is a very unlikely case that must boil down to personality. What are the chances of that, given the no. of examples otherwise.
Of course, you could take the path of experimentation and separate when necessary and keep it that way. But for the majority of unlucky people, without further proof, it is probably better to err on the side of caution. Thus I disagree with Younglin's description.
By the way, I was comparing a trend. The closer species pop out to humans on the scale of evolution, the more they tend to show some form of emotion.
