Oh cool. I always wanted to get texts all day alerting me to people walking dogs across the street and that the squirrel that lives in the tree in the front yard has descended again.
I would like to politely inform you that the neighbor has gone out to get the mail. This is an urgent matter, you must attend to it at once.
Sincerely,
Doggo
There's the "neighbor let the dog out" barking, unexpected car door, terrible music, that creepy neighbor guy, battlestations: generally unfamiliar dog or delivery person pulled up.
They can actually communicate quite a lot.
Also, "there's something I want but I can't get it", very similar to "I want to be somewhere but I'm stuck" (usually she trapped herself in the bathroom). Even though both are a shrill YARP, the former is insistent, the latter is uncertain.
Then there's "throw the damn ball already", "cat, get away from my food", and the ultra rare yet adorable ambulance howl.