My baby is an indoor cat but goes outside on a harness. Since we moved house there is a ginger cat that comes in the garden, comes up to the window and stares at my cat. She goes into full territorial mode, scratching at the glass, hitting it, hissing, screaming, growling. The other cat just sits and stares. I banged in the glass it make it go away and then it came back!! Anyway, I’m running out of ideas to get rid of the other cat but I really need help to calm my cat down after it happens. Any ideas?