sentry duty

Lulu has taken up a habit of sitting at the garden gate as if on guard duty. She dutifully hisses at some passers by.
Adam is a cat that lives in the house across the road and he (although if truth be told, we are a bit unsure about his gender) has taken up a similar role there.
They often pass the time of day staring across the road at each other, somewhat reminiscent of the North and South Koreans across the DMZ.