I have three cats; two large males (Sassy and Striker) and one small female (Missy). Weighing in at 7 lbs, Missy is about half the size and weight of either the two boys, and I used to worry that they pushed her around.

Last night, while Sassy was reclining in a cardboard box, I watched as Missy walked up and glared at him in silence. Sassy snarled a little, then jumped out of the box and hurried away nervously. Missy then climbed into the box, settled down, and went to sleep. CLearly Missy had sent the non-verbal message, "This is MY box. Get your mangy tail out of there."

And earler in the evening, I had to step in as referree when Missy commandeered Striker's food bowl.

I think I'll quit worrying.