I, too, think that the pets get along nicely until a human arrives home. Even though I spend most of my time at home (retired) the pets still struggle for the spot closest to MOM. I suspect they try to kill each other when I am home, so that they can be the one and only pet. Dog included.

Of course there are those that don't like each other, ever, but mine all groom each other on occasion, and sniff butts..... but it is a different game when I am home. When I have company, they all try to get there first, to be petted and paid attention to.....

Love bugs are nice, aren't they?