Well, I bet they wouldn't be like that to a stranger. My cats usually run and hide whenever someone they're not familiar with comes in.
One of my cats (a girl) absolutely abhors two more of my cats (both boys) so. I mean, they'll just be strolling down the hall and suddenly HISSING SPITTING CAT FROM BEHIND THE DOOR. and then she swats them in the face and then somebody's eye gets hurt and fkdlsjsl. AT THE VERY LEAST, THEY'RE NOT AS MENTALLY ILL AS DOGS.
Believe me, D/P arc will be the best thing you've ever read after the trainwreck that is Emerald.