The biggest mistake most pet owners make is assuming they can predict what their animal will do next.
I love Timber as much, if not more than any other animal I've ever had. But, I don't trust that he will act or behave in a way or manner that I can predict or depend on. I can't think like he thinks.
Most dogs, cats, horses, etc. don't trust each other. Love your pet/partner with all your heart, but don't trust him or her to always and predictably do or act as you want or think he or she should or will act.
One more little detail; as a rule, I trust humans even less.