I'm impressed by Catland's answer. Here Tigris is something bullying Filou. Sometimes it's only Tigris being in a bad mood (so you tell me I should eat that food and won't open a fresh can? Then I'll beat my brother up) but more than sometimes it is Filou just teasing Tigris (saying I can get away with everything)- sorry for anthropomorphizing

I believe that that barrier idea would help here too.