Cats' Body Language

The way integration of a new cat to existing cats in a household lays the groundwork for their future social hierarchy. Ronron, the cat on the right, appears to be displeased with the intrusion of Philo (perhaps Philo is sitting in her bed). Ronron has one cautious paw raised and her head is pulled back slightly, indicating "defensive aggression," and both cats are staring intently at each other (an attempt at intimidation.) However, as Rachel pointed out, Ronron's ears are still directed in Philo's direction, so we can tell her curiosity is stronger than her fear.